BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to a single-mouth nozzle head to receive a valve for
inflation. The nozzle head can be operated smoothly with one hand to enhance its convenience
greatly
2. Description of the Prior Art
[0002] Conventional dual nozzle heads are as disclosed in Taiwan application No.
095107665 and
097203517. However, the conventional dual nozzle heads have the following drawbacks.
- 1. When the conventional nozzle head is used to pump air, the user needs to hold the
main body for controlling the valve to be inserted to a connection mouth with one
hand and to push the wrench with the other hand, such that the interior press cylinder
is moved downward to clamp the valve for pumping. This way with both hands to operate
is inconvenient and wastes time and energy.
- 2. The connecting mouth of the conventional nozzle head is deformed axially through
the press cylinder to be moved downward. The connecting mouth is indirectly deformed
to clamp the valve. The radial deformation of the connecting mouth is quite limited,
so the force for the connecting mouth to clamp the valve is also limited. When pumping,
it is easy to have a leakage problem.
- 3. The entire structure of the conventional nozzle head is too complicated, so the
manufacture cost and the assembly cost cannot be lowered.
[0003] Accordingly, the inventor of the present invention has devoted himself based on his
many years of practical experiences to solve this problem.
SUMMARY OF THE INVENTION
[0004] The primary object of the present invention is to provide a nozzle head which can
be operated smoothly with one hand for inflation and can be used for different types
of valves to be inflated.
[0005] According to one aspect of the present invention, a single-mouth nozzle head is provided.
The nozzle head comprises a main body, an annular first connecting mouth, and a valve
plug.
[0006] The main body has a through valve hole and an air supply hole disposed between two
ends of the valve hole.
[0007] The annular first connecting mouth has a first mouth hole for receiving a valve to
be inflated.
[0008] The valve plug is disposed in the main body. The first connecting mouth is located
in the valve plug. The valve plug is axially movable between a first position and
a second position of the valve hole. One end of the valve plug is provided with a
plurality of clamping claws. The other end of the valve plug is formed with a closed
press portion. The interior of the valve plug is formed with a flow passage to communicate
with an outer annular wall of the valve plug. A plurality of restraint grooves are
formed in between the clamping claws and arranged in a circle to define a restraint
hole. The restraint hole and the valve hole are coaxial. The restraint hole is able
to contract radially. The outer wall of each clamping claw is formed with a curved
portion which is enlarged radially. The restraint hole is for the first connecting
mouth to be inserted axially. When the first valve is inserted into the first connecting
mouth, the valve plug is moved to the first position and the press portion extends
out of the valve hole. The valve hole compresses the clamping claws. Through the guide
of the curved portions of the clamping claws, the restraint hole is to clamp the first
connecting mouth radially. The air supply hole is in communication with the interior
of the valve plug, the flow passage, and the first mouth hole, so that the first valve
can be pumped.
[0009] Accordingly, the present invention has the following inventiveness.
- 1. When the present invention is used to pump air, the user can operate the main body
with one hand easily. Compared to the prior art operated with both hands, the present
invention can be operated more conveniently to save time and labor.
- 2. The clamping claws of the present invention directly compress the connecting mouth
to deform radially so as to tighten the valve. During inflation, the circumstances
of air leakage can be minimized.
- 3. The present invention is only composed of four parts, namely, the main body, the
first connecting mouth, the second mouth, and the valve plug. The entire structure
of the present invention is more simple that the prior art.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010]
Fig. 1 and Fig. 2 are perspective views showing a first valve; Fig. 3 is a sectional
view of Fig. 2;
Fig. 4 is a sectional showing a second valve; Fig. 5 is an exploded view according
to an embodiment of the present invention;
Fig. 6 is a perspective view of Fig. 5;
Fig. 7 and Fig. 8 are schematic views of the embodiment of the present invention when
in use;
Fig. 9 and Fig. 10 are schematic views of the embodiment of the present invention
in another use state.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0011] The present invention will now be described, by way of example only, with reference
to the accompanying drawings.
[0012] Referring to Fig. 1 to Fig. 4, an automatic-switch nozzle head having two valve mouths
is disclosed. The nozzle head comprises a main body 10, an annular first connecting
mouth 20, an annular second connecting mouth 30, and a valve plug 40.
[0013] The main body 10 has a valve hole 11 penetrating upper and lowers of the main body
10 and an air supply hole 12 disposed between two ends of the valve hole 11. The air
supply hole 12 is adapted to supply an air pressure source to the valve hole 11. The
wall of the lower end edge of the valve hole 11 is concaved and formed with a first
engaging portion 13. The wall of the lower end edge of the valve hole 11 is concaved
and formed with a second engaging portion 14.
[0014] The annular first connecting mouth 20 has a first mouth hole 21 for receiving a first
valve 91 to be inflated.
[0015] The annular second connecting mouth 30 has a second mouth hole 31 for receiving a
second valve 92 to be inflated.
[0016] The valve plug 40 is coaxially moved in the valve hole 11 and has a length larger
than that of the valve hole 11, such that two ends of the valve plug 40 protrude out
of the valve hole 11. The valve plug 40 is formed with a first guide groove 411 and
a second guide groove 412 which are not in communication with each other and located
within the valve hole 11. The second guide groove 412 is disposed above the first
guide groove 411. The outer wall of the valve plug 40 is provided with a first washer
421 under the first guide groove 411, a second washer 422 above the second guide groove
412, and a third washer 423 between the first guide groove 411 and the second guide
groove 412. The first washer 421, the second washer 422 and the third washer 423 are
against the valve hole 11, providing an airtight effect to the first guide groove
411 and the second guide groove 412. The outer wall of the valve plug 40 is further
provided with a first buckle portion 431 to mate with the first engaging portion 13
and a second buckle portion 432 to mate with the second engaging portion 14. When
the valve plug 40 is axially moved along the valve hole 11 to a first position, the
first buckle portion 431 engages with the first engaging portion 13 and the second
buckle portion 432 disengages from the second engaging portion 14. At this time, the
first guide groove 411 communicates with the air supply hole 12, and the top end of
the valve plug 40 protrudes out of the valve hole 11 for the user to press downward
to disengage the first buckle portion 431 from the first engaging portion 13. When
the valve plug 40 is axially moved along the valve hole 11 to a second position, the
second buckle portion 432 engages with the second engaging portion 14 and the first
buckle portion 431 disengages from the first engaging portion 13. At this time, the
second guide groove 412 communicates with the air supply hole 12, and the bottom end
of the valve plug 40 protrudes out of the valve hole 11 for the user to press upward
to disengage the second buckle portion 432 from the second engaging portion 14. Thus,
the valve plug 40 is able to move between the first position and the second position.
The bottom of the valve plug 40 is provided with a plurality of first clamping claws
44 which are disposed axially. The top of the valve plug 40 is provided with a plurality
of second clamping claws 45 which are disposed axially. A plurality of first restraint
grooves 46 are formed in between the first clamping claws 44 and arranged in a circle
to define a first restraint hole 47 at the inner sides of the first clamping claws
44. The first restraint hole 47 and the valve hole 11 are coaxial, and the first restraint
hole 47 is able to contract radially. The outer side of each first clamping claw 44
is formed with a first curved portion for pressing the valve hole 11 radially. The
first buckle portion 431 is disposed on the first curved portion. The first restraint
hole 47 is adapted for the first connecting mouth 20 to be inserted coaxially, so
that the first mouth hole 21 communicates with the first guide groove 411. A plurality
of second restraint grooves 48 are formed in between the second clamping claws 45
and arranged in a circle to define a second restraint hole 49 at the inner sides of
the second clamping claws 45. The second restraint hole 49 and the valve hole 11 are
coaxial, and the second restraint hole 49 is able to contract radially. The outer
side of each second clamping claw 45 is formed with a second curved portion for pressing
the valve hole 11 radially. The second buckle portion 432 is disposed on the second
curved portion. The second restraint hole 49 is adapted for the second connecting
mouth 30 to be inserted coaxially, so that the second mouth hole 31 communicates with
the second guide groove 412.
[0017] Referring to Fig. 2 and Fig. 3, when the user operates the main body 10 with one
hand to insert the first valve 91 into the first mouth hole 21 of the first connecting
mouth 20, the valve plug 40 will be moved to the first position. The first buckle
portion 431 engages with the first engaging portion 13 to position the valve plug
40 in the valve hole 11. This moment, the outer walls of the second clamping claws
45 are released from the valve hole 11 to compress the first curved portion formed
on the outer wall of each first clamping claw 44, such that the first restraint hole
47 radially tighten the outer wall of the first connecting mouth 20 with the first
mouth hole 21 to restrain and fix the first valve 91 directly and radially. After
that, through the air supply hole 12 to provide the air pressure source, the first
valve 91 is pumped for inflation. After inflation, the top end of the valve plug 40
is pressed downward for the first buckle portion 431 to disengage from the first engaging
portion 13, such that the first curved portions formed on the outer walls of the first
clamping claws 44 are released from the valve hole 11 to release connection of the
first connecting mouth 20 and the first valve 91.
[0018] Referring to Fig. 4, when the user operates the main body 10 with one hand to insert
the second valve 92 into the second mouth hole 31 of the second connecting mouth 30,
the valve plug 40 will be moved to the second position. The second buckle portion
432 engages with the second engaging portion 14 to position the valve plug 40 in the
valve hole 11. This moment, the outer walls of the first clamping claws 44 are released
from the valve hole 11 to compress the second curved portion formed on the outer wall
of each second clamping claw 45, such that the second restraint hole 49 radially tighten
the outer wall of the second connecting mouth 30 with the second mouth hole 31 to
restrain and fix the second valve 92 directly and radially. After that, through the
air supply hole 12 to provide the air pressure source, the second valve 92 is pumped
for inflation. After inflation, the bottom end of the valve plug 40 is pressed upward
for the second buckle portion 432 to disengage from the second engaging portion 14,
such that the second curved portions formed on the outer walls of the second clamping
claws 45 are released from the valve hole 11 to release connection of the second connecting
mouth 30 and the second valve 92.
[0019] For a stable structure of the present invention, the bottom end of each first clamping
claw 44 has a first stop portion 441. The outer edge of the first stop portion 441
is located out of the valve hole 11 to form a diameter larger than that of the valve
hole 11. The inner edge of the first stop portion 441 leans against the bottom end
of the first connecting mouth 20. The top end of each second clamping claw 45 has
a second stop portion 451. The outer edge of the second stop portion 451 is located
out of the valve hole 11 to form a diameter larger than that of the valve hole 11.
The inner edge of the second stop portion 451 leans against the top end of the second
connecting mouth 30. Thus, the valve plug 40 won't disengage from the valve hole 11,
the first connecting mouth 20 won't disengage from the first clamping claws 44, and
the second connecting mouth 30 won't disengage from the second clamping claws 45.
The first stop portion 441 and the second stop portion 451 are adapted to clamp the
first valve 91 and the second valve 92, respectively, to prevent the first and second
valves 91, 92 from disconnection during inflation.
[0020] According to the aforesaid illustration, the present invention has the following
inventiveness.
- 1. The main body of present invention can be operated with one hand to insert the
valve into one of the connecting mouths, and the plug valve is moved to a certain
position for the valve hole to move the corresponding clamping claws and the connecting
mouth to restrain the valve automatically. Compared to the prior art operated with
both hands, the present invention can be operated conveniently.
- 2. Through the coaxial moment of the valve hole and the clamping claws, the connecting
mouth of the present invention can be directly and radially deformed to restrain the
valve, so that the force for the connecting mouth to clamp and restrain the valve
is increased. During inflation, the circumstances of air leakage can be minimized.
Besides, the clamping claws can clamp the valve to prevent the valve from disengaging
from the main body during inflation.
[0021] Referring to Fig. 5 to Fig. 8, an embodiment of the present invention discloses a
single-mouth nozzle head 50. The single-mouth nozzle head 50 comprises a main body
51, a valve plug 52, and a first connecting mouth 55.
[0022] The main body 51 has a valve hole 511 which is an axial through hole, a pipe head
515 formed on an outer wall thereof, an air supply hole 514 for the pipe head 515
to communicate with the valve hole 511, and an annular flange 512 formed at a top
end thereof. The annular flange 512 is reduced radially. The outer wall of the bottom
end of the main body 51 is formed with outer threads 513 for a holding ring 57 to
be locked thereon. The holding ring 57 has an axial through hole 571. The inner wall
of the through hole 571 is formed with inner threads 572. The bottom end of the holding
ring 57 is formed with an annular holding edge 573 which is reduced radially.
[0023] The valve plug 52 has a closed top end. The valve plug 52 has an annular shoulder
portion 522 close to the top end and a press portion 521 above the annular shoulder
portion 522. The diameter of the press portion 521 is smaller than that of the annular
shoulder portion 522. The bottom of the valve plug 52 is coupled with a press ring
56. The outer wall of the valve plug 52 is formed with two spaced annular grooves
523, 526. A first washer 53 and a second washer 54 are respectively fitted in the
annular grooves 523, 526. A concave guide groove 524 is formed between the annular
grooves 523, 526. A portion of the guide groove 524 is formed with a vent 525 which
extends to the interior of the valve plug 52. The valve plug 52 has a connecting portion
528 extending from the interior to the bottom end of the valve plug 52. The connecting
portion 528 is a flow passage extending to the bottom end and communicating with the
vent 525. The outer wall is formed with outer threads 527 for the press ring 56 to
be locked thereon. The press ring 56 has a restraint hole 561 which is an axial through
hole. The inner wall of the restraint hole 561 is formed with inner threads 562. The
bottom end of the press ring 56 is formed with a plurality of clamping claws 563.
A plurality of restraint grooves 564 are formed in between the clamping claws 563
and arranged in a circle to define a restraint hole 561. The restraint hole 561 and
the valve hole 511 are coaxial, and the restraint hole 561 can contract radially.
The bottom end of each clamping claw 563 is formed with a hook portion 5631 extending
radially. The outer wall of each clamping claw 563 is formed with a curved portion
565 which is enlarged radially. The clamping claws 563 can be retracted radially by
applying a force. When the force is released, the clamping claws 563 will slightly
expand and restore to the original state.
[0024] The first connecting mouth 55 has a first mouth hole 551 which is an axial through
hole. The inner wall of the first mouth hole 551 is formed with an annular wedge edge
552 which is reduced radially. The first connecting mouth 55 is coaxially inserted
into the restraint hole 561. The first connecting mouth 55 is held by the hook portion
5631 at the bottom end of each clamping claw 563.
[0025] Referring to Fig. 7 and Fig. 8, when the single-mouth nozzle head 50 of this embodiment
is to pump, the pipe head 515 is connected with an air pressure source (not shown
in the drawings) in advance. When the first valve 91 is inserted into the first mouth
hole 551 of the first connecting mouth 55, the valve plug 52 is moved upward for the
press portion 521 to extend out of the valve hole 511 until the annular shoulder portion
522 is against the annular flange 512 (the first position) to stop moving. When moved
upward, the curved portions 565 of the clamping claws 563 are pushed by the annular
holding edge 573 at the bottom edge of the valve hole 511. Through the guide of the
curved portions 565 of the clamping claws 563, the restraint hole 561 is to clamp
the first connecting mouth 55 radially, so that the first connecting mouth 55 is compressed
to clamp the first valve 91 tightly. The air supply hole 514 is in communication with
the guide groove 524, the connecting portion 528, and the first mouth hole 551 so
that the first valve 92 can be pumped. The first valve 91 is an American valve.
[0026] Referring to Fig. 9 and Fig. 10, a single-mouth nozzle head is applied to the second
valve 92. The second valve 92 is a French valve 92. The shape of the connecting portion
528A of the valve plug 52A is slightly different from the second connecting mouth
55A, and the other parts are identical to the aforesaid embodiment. The connecting
portion 528A of the valve plug 52A is formed with a larger flow passage for insertion
of the French valve. The inner annular surface of the second connecting mouth 55A
is formed with an annular flange 552A for clamping the French valve tightly. The use
and working principle are same as the aforesaid.
[0027] Although a particular embodiment of the present invention has been described in detail
for purposes of illustration, various modifications and enhancements may be made without
departing from the spirit and scope of the present invention. Accordingly, the present
invention is not to be limited except as by the appended claims.
1. A single-mouth nozzle head, comprising:
a main body (51) having a through valve hole (511) and an air supply hole (514) disposed
between two ends of the valve hole (511);
an annular first connecting mouth (55) having a first mouth hole (551) for receiving
a valve (91) to be inflated; and
a valve plug (52) disposed in the main body (51), the first connecting mouth (55)
being located in the valve plug (52), the valve plug (52) being axially movable between
a first position and a second position of the valve hole (511), one end of the valve
plug (52) being provided with a plurality of clamping claws (563), another end of
the valve plug (52) being formed with a closed press portion (521), the interior of
the valve plug (52) being formed with a flow passage to communicate with an outer
annular wall of the valve plug (52), a plurality of restraint grooves (564) being
formed in between the clamping claws (563) and arranged in a circle to define a restraint
hole (561), the restraint hole (561) and the valve hole (511) being coaxial, the restraint
hole (561) being able to contract radially.
2. The single-mouth nozzle head as claimed in claim 1, wherein a bottom end of each clamping
claw (563) is formed with a hook portion (5631) extending radially, and the first
connecting mouth (55) is held by the hook portion (5631) at the bottom end of each
clamping claw (563).
3. The single-mouth nozzle head as claimed in claim 1, wherein an outer wall of each
clamping claw (563) is formed with a curved portion (565) which is enlarged radially.
4. The single-mouth nozzle head as claimed in claim 1, wherein an outer wall of the valve
plug (52) is formed with two spaced annular grooves (523, 526), a first washer (53)
and a second washer (54) are respectively fitted in the annular grooves (523, 526),
a concave guide groove (524) is formed between the annular grooves (523, 526), the
guide groove (524) is formed with a vent (525) to communicate with the flow passage
inside the valve plug (52), when the valve plug (52) is moved to the first position,
the guide groove (524) is in communication with the air supply hole (514).