Retractable speaker structure for use in a vehicle

Description

BACKGROUND OF THE INVENTION

Field of the Invention

[0001] The present invention relates to a speaker structure, especially to a retractable speaker structure for use in a vehicle.

Description of Related Art

[0002] At present, the mainframe of an audio/video equipment is mainly mounted in a panel at the front side of a driver's seat, and the speaker is mounted in a vehicle door or the panel; because the speaker has directivity relative to the user, the mounting location of the speaker plays an important role regarding to the entertaining effect; for allowing the speaker to provide an excellent performance, the speaker has to be protrudingly installed on the panel or the vehicle door, however, the above-mentioned arrangement would cause the speaker to be more likely to be damaged.

[0003] As such, there is a retractable speaker structure available in the market, in which a motor is adopted for driving a retracting mechanism to move, and a speaker is secured at an end section of the retracting mechanism and moved with the retracting mechanism, thereby allowing the speaker to be selectively protruded out or retracted in the panel or the vehicle door according to the actual needs.

[0004] However, the motor adopted in the above-mentioned retractable speaker structure is mostly a synchronizing motor, and the synchronizing motor has properties of constant sped, no need for speed adjustment and requiring a smaller starting torque, so the retractable speaker structure is required to be additionally installed with a reducing gear and a location sensor for adjusting the rotation speed of the retracting mechanism and limiting the stroke of the retracting mechanism, thereby causing the retractable speaker structure requiring complicated components and having relatively higher production cost. WO 2005/081520 A1 discloses a loudspeaker assembly, wherein the loudspeaker may be brought from a first non-exposed position into a second exposed position along an axis of movement, where the loudspeaker assembly comprises a transducer unit, means in the shape of for example motor means and a gearbox for moving the loudspeaker from the first position to the second position and vice-versa, and a closure member for covering the loudspeaker in its first position.

[0005] DE10324640 B3 discloses a mounting device for loudspeaker in automobile. The mounting device has a loudspeaker housing receiving the loudspeaker and a seating receiving the loudspeaker housing, with a drive unit allowing the loudspeaker housing to be displaced within the seating between a lowered stowed position and a raised working position, in which the loudspeaker can by pivoted or rotated about at least one geometrical axis.

[0006] US 2012/128194 A1 discloses a pop-up tweeter installed in a vehicle, comprising: a casing; a driving unit inserted into an inside of the casing and configured to be movable upward and downward within the casing; and a speaker mounted on a top of the driving unit and configured to be movable upward and downward within the casing.

[0007] Document DE19534400 A1 discloses retractable loudspeakers for use in vehicles. The loudspeakers are mounted so they can be moved between two positions dependent upon whether they are in or out of use.

[0008] Document US5072345 discloses a pop-up decorative landscape light - using lead screw or motor wound-unwound flexible coil to extend or retract light compartment from housing where a control selectively actuates a stepping motor for a predetermined number of revolutions in opposite rotation directions. A telescopically extensible member is secured to the light compartment. An elongated coil of flexible material has a free end extending through the telescopic extensible member. In view of the above-mentioned shortages, the applicant of the present invention has devoted himself for inventing a novel design to solve the above-mentioned shortages.

SUMMARY OF THE INVENTION

[0009] The present invention is to provide a retractable speaker structure for use in a vehicle, in which a stepping motor is adopted for driving a retracting mechanism to protrude or retract, so the retractable speaker structure is able to be adjusted for being protruded or retracted according to the actual needs, thereby effectively simplifying components and lowering production cost. The present invention provides a retractable speaker structure for use in a vehicle according to independent claim 1.

BRIEF DESCRIPTION OF DRAWING

[0010] 

FIG. 1 is a perspective exploded view showing the retractable speaker structure according to a first embodiment of the present invention;

FIG. 2 is another perspective exploded view showing the retractable speaker structure according to the first embodiment of the present invention;

FIG. 3 is a perspective view showing the assembly of the retractable speaker structure according to the first embodiment of the present invention;

FIG. 4 is a schematic view showing the operating status of the retractable speaker structure according to the first embodiment of the present invention;

FIG. 5 is another schematic view showing the operating status of the retractable speaker structure according to the first embodiment of the present invention;

FIG. 6 is another perspective view showing the assembly of the retractable speaker structure according to the first embodiment of the present invention;

FIG. 7 is a perspective view showing the assembly of the retractable speaker structure according to a second embodiment of the present invention;

FIG. 8 is a perspective exploded view showing the retractable speaker structure according to a third embodiment of the present invention;

FIG. 9 is a perspective exploded view showing the retractable speaker structure according to a fourth embodiment of the present invention; and

FIG. 10 is a perspective exploded view showing the retractable speaker structure according to a fifth embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0011] Preferred embodiments of the present invention will be described with reference to the drawings.

[0012] Please refer from FIG. 1 to FIG. 6, the present invention provides a retractable speaker structure for use in a vehicle. According to a first embodiment of the present invention, the retractable speaker structure (10) mainly includes a case (1), a driving member (2), a retracting mechanism (3) and a speaker (4).

[0013] As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 5, the case (1) is substantially formed in a rectangular shape, and formed with a chamber (11). The case (1) is formed with a base (12) and a cover (13) correspondingly engaged with the base (12), and the chamber (11) is formed between the base (12) and the cover (13). Wherein, the cover (13) is formed with a penetrated hole (131) and a position limiting slot (132).

[0014] As shown from FIG. 1 to FIG. 3, the driving member (2) is installed in the chamber (11) and includes a stepping motor (21) and a transmission shaft (22) connected to the stepping motor (21), wherein the stepping motor (21) is fastened on the case (1) and served to drive the transmission shaft (22) to rotate.

[0015] A further illustration is that the driving member (2) further includes a transmission gear (23) sleeved on the transmission shaft (22) and rotated with the transmission shaft (22).

[0016] As shown from FIG. 1 to FIG. 3, the retracting mechanism (3) is disposed in the chamber (11), and includes a screw rod (31) and a retractable rod (32) fitted with the screw rod (31). The screw rod (31) is driven by the transmission shaft (22) to rotate, thereby enabling the retractable rod (32) to perform a protruding/retracting movement relative to the screw rod (31).

[0017] A further illustration is that one end of the screw rod (31) is disposed corresponding to the base (12), the other end thereof and the retractable rod (32) are both disposed corresponding to the penetrated hole (131), and the retractable rod (32) is formed with an inner thread segment, the screw rod (31) is able to be fitted with the retractable rod (32) through the above-mentioned inner thread segment. Wherein, the outer wall of the retractable rod (32) is protrudingly formed with a spiral guide rail (321) correspondingly received in the position limiting slot (132).

[0018] In addition, the retracting mechanism (3) further includes a passive gear (33) connected to an end section of the screw rod (31) and linked with the screw rod (31), thereby enabling the transmission gear (23) and the passive gear (33) to be mutually engaged for transmission.

[0019] As shown from FIG. 3 to FIG. 6, the speaker (4) is secured at the end section of the retractable rod (32) and moved with the retractable rod (32), and with the installation of the above-mentioned spiral guide rail (321) and the position liming slot (132), the speaker (4) is enabled to be protruded or retracted with a rotating means.

[0020] As shown from FIG. 1 to FIG. 3, the retractable speaker structure (10) provided by the present invention further includes a storage cylinder (5) fastened on the cover (13) and disposed corresponding to the retractable rod (32), thereby allowing the speaker (4) to be stored in or protruded out from the storage cylinder (5).

[0021] Please refer from FIG. 3 to FIG. 6, the assembly of the retractable speaker structure (10) is that: the case (1) is formed with the chamber (11); the driving member (2) is installed in the chamber (11) and includes the stepping motor (21) and the transmission shaft (22) connected to the stepping motor (22), wherein the stepping motor (21) is fastened on the case (1) and served to drive the transmission shaft (22) to rotate; the retracting mechanism (3) is disposed in the chamber (11) and includes the screw rod (31) and the retractable rod (32) fitted with the screw rod (31), the screw rod (31) is driven by the transmissions shaft (22) to rotate, thereby enabling the retractable rod (32) to perform the protruding/retracting movement relative to the screw rod (31); the speaker (4) is secured at the end section of the retractable rod (32) and moved with the retractable rod (32). Accordingly, by the stepping motor (21) driving the retracting mechanism (3) to protrude or retract, the retractable speaker structure (10) is able to be adjusted for being protruded or retracted according to the actual needs, thereby effectively simplifying components and lowering production cost.

[0022] Please refer from FIG. 3 to FIG. 6, which disclose the operating status of the retractable speaker structure (10) provided by the present invention; when the retractable speaker structure (10) is installed in a vehicle and the speaker (4) is not in use, the speaker (4) is stored and hidden in the storage cylinder (5); when the speaker (4) is desired to be used, the stepping motor (21) drives the transmission shaft (22) to rotate, the transmission shaft (22) drives the transmission gear (23) to rotate, then the transmission gear (23) drives the passive gear (33) for enabling the screw rod (31) to rotate, because the inner thread segment of the retractable rod (32) is fitted with the screw rod (31), the retractable rod (32) is pushed by the screw rod (31) for being ascended, thereby allowing the speaker (4) to be ascended from the storage cylinder (5), and because the spiral guide rail (321) of the retractable rod (32) is limited by the position limiting slot (132), when the speaker (4) is pushed by the retractable rod (32) for being ascended from the storage cylinder (5), the speaker (4) is enabled to be rotated and ascended along with the spiral guide rail (321). In addition, the position limiting slot (132) is matched with the shape of the spiral guide rail (321), so the retractable rod (32) is able to be smoothly rotated for being ascended thereby avoiding the situation of unsmooth ascend or even being jammed. Moreover, when the speaker (4) is desired to be descended for being stored in the storage cylinder (5), the stepping motor (21) just reversely rotates for driving the transmission shaft (22) to rotate.

[0023] Wherein, the stepping motor (21) is one type of pulse motor, which is a motor gradually rotating with a certain angle, and an open loop is adopted for controlling, so a precise control of position and speed can be achieved without a feedback device for detecting location and speed. As such, the retractable speaker structure (10) provided by the present invention does not require a reducing gear nor a location sensor, and the rotation speed of the retractable rod (32) can still be effectively and stably controlled and the stroke of the retractable rod (32) can also be precisely limited, thereby allowing the retractable speaker structure (10) to be provided with advantages of simplifying components and lowering production cost.

[0024] Please refer to FIG. 7, which discloses a second embodiment illustrating the retractable speaker structure (10) provided by the present invention. The second embodiment is substantially the same as the first embodiment, and the difference between the two is that the outer wall of the retractable rod (32) is protrudingly formed with a linear guide rail (322).

[0025] A further illustration is that the outer wall of the retractable rod (32) is formed with the linear guide rail (322), the cover (13) is formed with a position limiting slot (132) allowing the linear guide rail (322) to be received therein, and the retractable rod (32) is disposed corresponding to the above-mentioned penetrated hole (131), the linear guide rail (322) is mutually positioned with the position limiting slot (132), thereby enabling the speaker (4) to be protruded or retracted with a linearly moving means, and the same function and effect as the first embodiment can be provided.

[0026] Please refer to FIG. 8, which discloses a third embodiment illustrating the retractable speaker structure (10) provided by the present invention. The third embodiment is substantially the same as the first embodiment, and the difference between the two is the configuration of the driving member (2), so the screw rod (31) is able to be driven by the transmission shaft (22) to rotate with a different means.

[0027] A detail illustration is that the driving member (2) further includes a first gear (24), a second gear (25) and a transmission chain (26); the first gear (24) is sleeved on the transmission shaft (22) and rotated with the transmission shaft (22), the second gear (25) is connected to the end section of the screw rod (31) and linked with the screw rod (31), and the transmission chain (26) is sleeved at the outer side of the first gear (24) and the second gear (25) and mutually engaged with the first gear (24) and the second gear (25) for transmission, so when the transmission shaft (22) is rotated, the transmission shaft (22) is able to drive the screw rod (31) to rotate through the first gear (24), the transmission chain (26) and the second gear (25) being mutually engaged. Accordingly, the same function and effect as the first embodiment can be provided.

[0028] Please refer to FIG. 9, which discloses a fourth embodiment illustrating the retractable speaker structure (10) provided by the present invention. The fourth embodiment is substantially the same as the first embodiment, and the difference between the two is the configuration of the driving member (2), so the screw rod (31) is able to be driven by the transmission shaft (22) to rotate with a different means.

[0029] A further illustration is that the driving member (2) further includes a first gear (24), a second gear (25) and a transmission belt (27); the first gear (24) is sleeved on the transmission shaft (22) and rotated with the transmission shaft (22), the second gear (25) is connected to the end section of the screw rod (31) and linked with the screw rod (31), and the inner wall of the transmission belt (27) is extended with an inner gear (271), the transmission belt (27) is sleeved at the outer side of the first gear (24) and the second gear (25), and the inner gear (271) is mutually engaged with the first gear (24) and the second gear (25) for transmission, so when the transmission shaft (22) is rotated, the transmission shaft (22) is able to drive the screw rod (31) to rotate through the first gear (24), the inner gear (271) and the second gear (25) being mutually engaged. Accordingly, the same function and effect as the first embodiment can be provided.

[0030] Please refer to FIG. 10, which discloses a fifth embodiment illustrating the retractable speaker structure (10) provided by the present invention. The fifth embodiment is substantially the same as the first embodiment, and the difference between the two is the configuration of the driving member (2), so the screw rod (31) is able to be driven by the transmission shaft (22) to rotate with a different means.

[0031] A detail illustration is that the driving member (2) further includes a first passive wheel (28), a second passive wheel (29) an a transmission belt (27'); the first passive wheel (28) is sleeved on the transmission shaft (22) and rotated with the transmission shaft (22), the second passive wheel (29) is connected to the end section of the screw rod (31) and linked with the screw rod (31), and the transmission belt (27') is tightly sleeved at the outer side of the first passive wheel (28) and the second passive wheel (29), so when the first passive wheel (28) is rotated, a friction force is generated between the transmission belt (27'), the first passive wheel (28) and the second passive wheel (29) thereby driving the second passive wheel (29) to rotate.

[0032] As such, when the transmission shaft (22) is rotated, the transmission shaft (22) is able to drive the screw rod (31) to rotate through the friction force generated between the first passive wheel (28), the transmission belt (27') and the second passive wheel (29). Accordingly, the same function and effect as the first embodiment can be provided.

Claims

1. A retractable speaker structure for use in a vehicle, including:

a case (1) having a chamber (11) formed between a base (12) and a cover (13);

a driving member (2), installed in the chamber (11) and including a stepping motor (21) and a transmission shaft (22) connected to the stepping motor (21), wherein the stepping motor (21) is fastened on the case (1) and drives the transmission shaft (22) to rotate, and the stepping motor (21) gradually rotates with a certain angle, and an open loop is adopted for controlling, so a precise control of position and speed can be achieved without a feedback device for detecting location and speed;

a retracting mechanism (3), disposed in the chamber (11) and including a screw rod (31) and a retractable rod (32) fitted with the screw rod (31), wherein the screw rod (31) is driven by the transmission shaft (22) to rotate, thereby enabling the retractable rod (32) to perform a protruding/retracting movement relative to the screw rod (31), and an outer wall of the retractable rod (32) is protrudingly formed with a spiral guide rail (321) or a linear guide rail (322), the cover (13) formed with a position limiting slot (132) allowing the spiral guide rail (321) or the linear guide rail (322) to be received therein; and

a speaker (4), secured at an end section of the retractable rod (32) and moved with the retractable rod (32).

2. The retractable speaker structure for use in a vehicle according to claim 1, wherein the driving member (2) further includes a transmission gear (23) sleeved on the transmission shaft (22) and rotated with the transmission shaft (22); the retracting mechanism (3) further includes a passive gear (33) connected to an end section of the screw rod (31) and linked with the screw rod (31), thereby enabling the transmission gear (23) and the passive gear (33) to be mutually engaged for transmission.

3. The retractable speaker structure for use in a vehicle according to claim 1, wherein the driving member (2) further includes a first gear (24), a second gear (25) and a transmission chain (26); the first gear (24) is sleeved on the transmission shaft (22) and rotated with the transmission shaft (22), the second gear (25) is connected to an end section of the screw rod (31) and linked with the screw rod (31), and the transmission chain (26) is sleeved at an outer side of the first gear (24) and the second gear (25) and mutually engaged with the first gear (24) and the second gear (25) for transmission.

4. The retractable speaker structure for use in a vehicle according to claim 1, wherein the driving member (2) further includes a first gear (24), a second gear (25) and a transmission belt (27); the first gear (24) is sleeved on the transmission shaft (22) and rotated with the transmission shaft (22), the second gear (25) is connected to an end section of the screw rod (31) and linked with the screw rod (31), and an inner wall of the transmission belt (27) is extended with an inner gear (271), the transmission belt (27) is sleeved at an outer side of the first gear (24) and the second gear (25), and the inner gear (271) is mutually engaged with the first gear (24) and the second gear (25) for transmission.

5. The retractable speaker structure for use in a vehicle according to claim 1, wherein the driving member (2) further includes a first passive wheel (28), a second passive wheel (29) and a transmission belt (27'); the first passive wheel (28) is sleeved on the transmission shaft (22) and rotated with the transmission shaft (22), the second passive wheel (29) is connected to an end section of the screw rod (31) and linked with the screw rod (31), and the transmission belt (27') is tightly sleeved at an outer side of the first passive wheel (28) and the second passive wheel (29).

6. The retractable speaker structure for use in a vehicle according to claim 1, wherein the cover (13) is correspondingly engaged with the base (12).

7. The retractable speaker structure for use in a vehicle according to claim 6, wherein the cover (13) is formed with a penetrated hole (131), one end of the screw rod (31) is disposed corresponding to the base (12), and the other end thereof and the retractable rod (32) are both disposed corresponding to the penetrated hole (131).

8. The retractable speaker structure for use in a vehicle according to claim 6, further including a storage cylinder (5) fastened on the cover (13) and disposed corresponding to the retractable rod (32), thereby allowing the speaker (4) to be stored in or protruded out from the storage cylinder (5).

9. The retractable speaker structure for use in a vehicle according to claim 1, wherein the retractable rod (32) is formed with an inner thread segment, and the screw rod (31) is able to be fitted with the retractable rod (32) through the inner thread segment.

Ansprüche

1. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug, beinhaltend:

ein Gehäuse (1) mit einer Kammer (11), die zwischen einer Basis (12) und einer Abdeckung (13) gebildet ist;

ein Antriebselement (2), das in der Kammer (11) installiert ist und einen Schrittmotor (21) und eine mit dem Schrittmotor (21) verbundene Getriebewelle (22) aufweist, wobei der Schrittmotor (21) an dem Gehäuse (1) befestigt ist und die Getriebewelle (22) zum Drehen antreibt, und der Schrittmotor (21) sich allmählich mit einem bestimmten Winkel dreht, und eine offene Schleife zur Steuerung eingerichtet ist, so dass eine präzise Steuerung von Position und Geschwindigkeit ohne ein Rückkopplungsgerät zur Erkennung von Ort und Geschwindigkeit ermöglicht wird;

einen in der Kammer (11) angeordneten Einziehmechanismus (3), der eine Gewindestange (31) und eine mit der Gewindestange (31) versehene einziehbare Stange (32) umfasst, wobei die Gewindestange (31) von der Getriebewelle (22) angetrieben wird, um sich zu drehen, wodurch die einziehbare Stange (32) eine ausfahrende/einziehende Bewegung relativ zur Gewindestange (31) ausführen kann, und eine Außenwand der einziehbaren Stange (32) hervorstehend mit einer spiralförmigen Führungsschiene (321) oder einer linearen Führungsschiene (322) ausgebildet ist, wobei die Abdeckung (13) mit einem positionsbegrenzenden Schlitz (132) gebildet ist, der die spiralförmige Führungsschiene (321) oder die lineare Führungsschiene (322) aufnehmen kann, und einen Lautsprecher (4), der an einem Endabschnitt der einziehbaren Stange (32) befestigt ist und mit der einziehbaren Stange (32) bewegt wird.

2. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 1, wobei das Antriebselement (2) weiterhin ein Übertragungsrad (23) aufweist, das auf der Übertragungswelle (22) aufgezogen ist und mit der Übertragungswelle (22) gedreht wird; wobei der Einziehmechanismus (3) ferner ein passives Zahnrad (33) aufweist, das mit einem Endabschnitt der Gewindestange (31) verbunden und mit der Gewindestange (31) verbunden ist, wodurch das Übertragungsrad (23) und das passive Zahnrad (33) für die Übertragung gegenseitig in Eingriff gebracht werden können.

3. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 1, wobei das Antriebselement (2) weiterhin ein erstes Zahnrad (24), ein zweites Zahnrad (25) und eine Übertragungskette (26) aufweist; wobei das erste Zahnrad (24) auf der Getriebewelle (22) aufgezogen ist und mit der Getriebewelle (22) gedreht wird, wobei das zweite Zahnrad (25) mit einem Endabschnitt der Gewindestange (31) verbunden und mit der Gewindestange (31) verbunden ist, und die Übertragungskette (26) an einer Außenseite des ersten Zahnrads (24) und des zweiten Zahnrads (25) aufgezogen ist und mit dem ersten Zahnrad (24) und dem zweiten Zahnrad (24) in Eingriff steht.

4. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 1, wobei das Antriebselement (2) weiterhin ein erstes Zahnrad (24), ein zweites Zahnrad (25) und einen Antriebsriemen (27) aufweist; wobei das erste Zahnrad (24) auf der Getriebewelle (22) aufgezogen ist und mit der Getriebewelle (22) gedreht wird, wobei das zweite Zahnrad (25) mit einem Endabschnitt der Gewindestange (31) verbunden und mit der Gewindestange (31) verbunden ist, und eine Innenwandung des Antriebsriemens (27) mit einem Innenzahnrad (271) gespannt ist, der Antriebsriemen (27) an einer Außenseite des ersten Zahnrads (24) und des zweiten Zahnrads (25) aufgezogen ist, und das Innenzahnrad (271) mit dem ersten Zahnrad (24) und dem zweiten Zahnrad (25) für die Übertragung gegenseitig in Eingriff steht.

5. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 1, wobei das Antriebselement (2) weiterhin ein erstes passives Rad (28), ein zweites passives Rad (29) und einen Antriebsriemen (27') aufweist; wobei das erste passive Rad (28) auf der Getriebewelle (22) aufgezogen ist und mit der Getriebewelle (22) gedreht wird, wobei das zweite passive Rad (29) mit einem Endabschnitt der Gewindestange (31) verbunden und mit der Gewindestange (31) verbunden ist, und der Antriebsriemen (27') an einer Außenseite des ersten passiven Rads (28) und des zweiten passiven Rads (29) fest aufgezogen ist.

6. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 1, wobei die Abdeckung (13) entsprechend mit der Basis (12) in Verbindung steht.

7. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 6, wobei die Abdeckung (13) mit einem durchbohrten Loch (131) ausgebildet ist, ein Ende der Gewindestange (31) entsprechend der Basis (12) angeordnet ist und das andere Ende davon und die einziehbare Stange (32) beide entsprechend dem durchbohrten Loch (131) angeordnet sind.

8. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 6, ferner mit einem Speicherzylinder (5), der an der Abdeckung (13) befestigt und entsprechend der einziehbaren Stange (32) angeordnet ist, so dass der Lautsprecher (4) in dem Speicherzylinder (5) gelagert oder aus diesem ausgefahren werden kann.

9. Einziehbare Lautsprecherstruktur zur Verwendung in einem Fahrzeug nach Anspruch 1, wobei die einziehbare Stange (32) mit einem Innengewinde-Segment ausgebildet ist, und die Gewindestange (31) mit der einziehbaren Stange (32) durch das Innengewinde-Segment hindurch angebracht werden kann.

Revendications

1. Une structure de haut-parleur rétractable à utiliser dans un véhicule, comprenant:

un boîtier (1), formé avec une chambre (11) et un couvercle (13) ;

un élément d'entraînement (2), installé dans la chambre (11) et comprenant un moteur pas à pas (21) et un arbre de transmission (22) relié au moteur pas à pas (21), dans lequel le moteur pas à pas (21) est fixé sur le boîtier (1) et entraîne l'arbre de transmission (22) en rotation, et le moteur pas à pas (21) tourne graduellement avec un certain angle, et une boucle ouverte est adoptée pour la commande, de telle manière qu'une commande précise de la position et de la vitesse peuvent être obtenue sans dispositif de rétroaction pour la détection de la position et de la vitesse ;

un mécanisme de rétraction (3), disposé dans la chambre (11) et comprenant une tige de vis (31) et une tige rétractable (32) équipée de la tige de vis (31), dans lequel la tige de vis (31) est entraînée en rotation par l'arbre de transmission (22), permettant ainsi à la tige rétractable (32) d'effectuer un mouvement de saillie/ rétraction par rapport à la tige de vis (31); et une paroi extérieure de la tige rétractable (32) est formée en saillie avec un rail de guidage hélicoïdal (321) ou un rail de guidage linéaire (322), le couvercle (13) étant formé avec une encoche de délimitation de position (132) permettant le logement du rail de guidage hélicoïdal (321) ou du rail de guidage linéaire (322) en son sein ; et

un haut-parleur (4), fixé à une section d'extrémité de la tige rétractable (32) et mobile avec la tige rétractable (32).

2. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 1, dans laquelle l'élément d'entraînement (2) comprend en outre un engrenage de transmission (23) gainé sur l'arbre de transmission (22) et entraîné en rotation avec l'arbre de transmission (22); le mécanisme rétractable (3) comprenant en outre un pignon passif (33) relié à une section d'extrémité de la tige de vis (31) et lié à la tige de vis (31), permettant ainsi à l'engrenage de transmission (23) et à l'engrenage passif (33)) d'être mutuellement en prise pour la transmission.

3. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 1, dans laquelle l'élément d'entraînement (2) comprend en outre un premier engrenage (24), un second engrenage (25) et une chaîne de transmission (26); le premier engrenage (24) étant emmanché sur l'arbre de transmission (22) et entraîné en rotation avec l'arbre de transmission (22), le second engrenage (25) étant relié à une section d'extrémité de la tige de vis (31) et en liaison avec la tige de vis (31), et la chaîne de transmission (26) étant emmanchée sur un côté extérieur du premier engrenage (24) et du second engrenage (25) et mutuellement en prise pour la transmission avec le premier engrenage (24) et le second engrenage (25).

4. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 1, dans laquelle l'élément d'entraînement (2) comprend en outre un premier engrenage (24), un second engrenage (25) et une courroie de transmission (27); le premier engrenage (24) étant emmanché sur l'arbre de transmission (22) et entraîné en rotation avec l'arbre de transmission (22), le second engrenage (25) étant relié à une section d'extrémité de la tige de vis (31) et en liaison avec la tige de vis (31), et une paroi interne de la courroie de transmission (27) est prolongée avec un engrenage interne (271), la courroie de transmission (27) étant emmanchée sur un côté extérieur du premier engrenage (24) et du second engrenage (25), et l'engrenage interne (271) étant mutuellement en prise pour la transmission avec le premier engrenage (24) et le second engrenage (25).

5. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 1, dans laquelle l'élément d'entraînement (2) comprend en outre une première roue passive (28), une seconde roue passive (29) et une courroie de transmission (27'); la première roue passive (28) étant emmanchée sur l'arbre de transmission (22) et entraînée en rotation avec l'arbre de transmission (22), la seconde roue passive (29) est reliée à une section d'extrémité de la tige de vis (31) et en liaison avec la tige de la vis (31), et la courroie de transmission (27') est manchonnée de manière étanche sur un côté extérieur de la première roue passive (28) et de la seconde roue passive (29).

6. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 1, dans laquelle le couvercle est en prise correspondante avec la base 12.

7. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 6, dans laquelle le couvercle (13) est formé avec un trou traversant (131), une extrémité de la tige de vis (31) est disposée de manière correspondante à la base (12), et l'autre extrémité de celle-ci ainsi que la tige rétractable (32) étant toutes deux disposées de manière à correspondre au trou traversant (131).

8. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 6, comprenant en outre un cylindre de stockage (5) fixé sur le couvercle (13) et disposé en correspondance par rapport à la tige rétractable (32), permettant ainsi de loger le haut-parleur (4) dans le cylindre de stockage (5) ou d'en sortie par saillie.

9. La structure de haut-parleur rétractable à utiliser dans un véhicule selon la revendication 1, dans laquelle la tige rétractable (32) est formée avec un segment de filetage intérieur, et la tige de vis (31) peut être équipée de la tige rétractable (32) à travers le segment de filetage interne.

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