KR101103965B1 - Push-up device - Google Patents

Abstract

(Problem) In the pressing apparatus provided for the opening operation of a fuel lid, etc., when a manipulator operates the push rod 2, it produces a click feeling, and improves a feeling of operation.
(Solution means) The pressing device 1 includes a locking piece 18 formed on the push rod 2, an upper cam 22 and a lower cam 24 for driving the locking piece 18, and a push rod ( 2) is attached to the upper cam 22 and the lower cam 24 in a state where the engaging piece 18 is held in the guide gap G formed between the first cam surface 21 and the second cam surface 23. It is relatively rotatable with respect to the guide gap G, and the narrow parts N1 and N2 smaller than the width which the locking piece 18 can pass through are formed, and the upper cam 22 has the locking piece 18 guided. When passing through the narrow parts N1 and N2 of the gap G, the narrow parts N1 and N2 are displaced so as to open.

Description

Piezo {PUSH-UP DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressing device having a push / push mechanism for switching a push rod into a retracted position and a protruding position. More particularly, the present invention relates to a pressing device which is very suitable for opening a fuel lid formed on a vehicle body. .

As a cover for protecting an oil supply port, a fuel lid is attached to an opening of a body shell so that opening and closing is possible through a hinge portion. As a device for performing the opening operation of this kind of fuel lid, there has been developed a push-up device having a push / push mechanism and driving the fuel lid whose unlocked state is released to the opening side by a push rod.

For example, as a push-pushing mechanism, a push rod has a cam portion that is sequentially engaged / released by a plurality of guide portions on a fixed side around the push rod, and the push rod in a retracted position when the fuel lid is pressed toward the vehicle body in a closed state. After the holding by the guide portion and the cam portion is released by the rotation thereof, there is known a rolling apparatus employing a rotary cam type that protrudes by the spring force and moves to the protruding position to push out the fuel lid (Patent Document 1). Reference).

Patent Document 1: Japanese Patent Application Laid-Open No. 2007-290573

However, since the mechanism for generating a click sound or a click feeling at the time of the position change of the push rod is not formed in the pusher device described in Patent Document 1, the operator has a problem that it is difficult to obtain the feeling that the operation is appropriate. Moreover, in the conventional pressing apparatus, since the holding force of the spring which presses a push rod toward the protrusion side acts on a comparatively small contact surface, the smooth rotation operation | movement of a push rod may be impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and an object thereof is to provide a pressure raising device that improves the operation feeling by generating a click feeling when the operator operates the push rod.

The first invention made in order to solve the above problems is a cam follower provided with a push-push mechanism for switching the push rod 2 to a retracted position and a protruding position, and a cam polo formed on the push rod 2. A protruding side cam 22 having a war 18, an annular first cam surface 21 for driving the cam follower 18 on the protruding position side of the push rod 2, and the first cam surface. A second cam surface 23 having an annular second cam surface 23 disposed opposite to 21, and the second cam surface 23 drives the cam follower 18 at the inlet position side of the push rod 2; And a side gap (24), wherein the push rod (2) has a guide gap (20) in which the cam follower (18) is formed between the first cam surface (21) and the second cam surface (23) during its movement. It is possible to rotate relative to the protruding side cam 22 and the retracting side cam 24 in the state held in G), and the cam pawl in the guide gap G. Narrow portions N1 and N2 smaller than the width through which the war 18 can pass are formed, and at least one side of the protruding side cam 22 and the retracting side cam 24 is formed by the cam follower 18. When passing through the narrow parts N1 and N2 of the guide gap G, the narrow parts N1 and N2 are displaced so as to open.

In a second aspect of the present invention, one side of the first holding means 12 for holding the push rod 2 toward the protruding position side, and one of the protruding side cams 22 and the inlet side cam 24 is directed toward the other side. The second finger holding means 34 is further provided, and the second finger holding means 34 may have a smaller holding force than the first finger holding means 12.

Further, as a third invention, the protruding side cam 22 and the retracting side cam 24 may be configured to rotate when the push rod 2 moves between the protruding position and the retracting position. .

According to the first aspect of the invention, when the cam follower is configured such that at least one of the protruding side cam and the inlet side cam is displaced so as to open the narrow portion when passing through the narrow portion of the guide gap, the operator operates the push rod. There is an excellent effect that the operation feeling is improved by generating a click feeling.

According to the second aspect of the present invention, there is provided a first holding means for holding one of the protruding side cams and the retracting side cam toward the other side, and the holding force of the second holding means holds the push rod. Since it is smaller than the holding force of the means, when the operator operates the push rod, it is possible to generate a feeling of click without disturbing smooth relative rotation of the push rod relative to the protruding side cam and the retracting side cam.

According to the third aspect of the present invention, it is possible to easily secure the pressing force necessary for the push rod, and to prevent the rotational movement of the protruding side cam and the retracting side cam when the operator operates the push rod. It can generate a click feeling without

1 is an exploded perspective view of a pressing apparatus according to an embodiment of the present invention.
2 is a front view showing the attachment state of the pressing apparatus according to the embodiment of the present invention.
3 is a cross-sectional view of the pressing apparatus according to the embodiment of the present invention.
4A is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
4B is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
4C is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
4D is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
4E is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
5A is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
5B is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
5C is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.
5D is a schematic diagram showing one operation of the pressing apparatus according to the embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of the pressure raising apparatus which concerns on embodiment of this invention is demonstrated in detail with reference to drawings. In the description of the present embodiment, the pressing apparatus and its components are described as "upper side" and "lower side" along the up-down direction in FIGS. 2 and 3.

The pressing device 1 is provided with a push / push mechanism for switching the push rod 2 as the pressing body into a retracted position (indicated by a dashed-dotted line in FIG. 2) and a protruding position (indicated by a solid line in FIG. 2), and is used for automobiles. Is used as a device for driving the fuel lid R (see Fig. 2) to the open side. The pressing apparatus 1 has a substantially cylindrical body 3 made of synthetic resin constituting the main body, and an upper end side of the push rod 2 accommodated in the body 3 is the head 4 of the body 3. It protrudes from the through-hole 4a formed in the cross section of (). In the body 3, a pair of fixing pieces 5 and 5 protrude from the outer peripheral surface so as to be inclined to the upper end side, and these fixing pieces 5 and 5 are the pressing device 1 for the plate-shaped member 6 of the vehicle body. ) Is used for attachment.

Attachment of the pressing apparatus 1 to the plate-shaped member 6 is performed by inserting the lower end side of the said pressing apparatus 1 into the attachment hole 6a. At this time, the fixing pieces 5, 5 are elastically deformed to be folded toward the center side of the body 3 when passing through the attachment hole 6a, and are elastically returned after passing through the attachment hole 6a, and thus the head portion 4 The plate member 6 is sandwiched between the lower edges of the edges. As a result, as shown in FIG. 2, the pressing apparatus 1 is firmly fixed to the plate-shaped member 6.

A cap-shaped rubber body cover 7 is attached to the outside of the head 4 of the body 3, and a through hole having the same shape as the through hole 4a is formed in the cross section of the body cover 7. 7a) (refer FIG. 1) is formed. Moreover, the blocking member 8 which blocks this is inserted in the opening of the lower end side of the body 3. The closure member 8 is fixed to the body 3 by the plurality of locking projections 9 being inserted into the locking holes 10 of the body 3 and being locked inside. In addition, a spring fixing rod 11 protrudes from an upper end side of the closure member 8, and the spring fixing rod 11 is inserted into the main spring 12 made of a compression spring. Fix the bottom side.

The push rod 2 is formed of a synthetic resin material, and has a head portion 16 to which a cap-shaped rubber rod cover 15 is attached, and a main body portion 17 forming a tubular shape. At the lower end of the main body 17, three locking pieces 18 as cam followers are formed. These locking pieces 18 are made of a rectangular plate-like member, and are arranged at equal intervals in the circumferential direction of the main body portion 17 and along the radial direction of the main body portion 17, respectively. The outer circumferential surface side of the locking piece 18 protrudes outward from the outer circumferential surface of the main body portion 17 and functions as an engaging portion of the upper cam 22 and the lower cam 24 described later. The through hole 4a having the outer circumferential shape of the main body portion 17 and a shape suitable for this has a plurality of irregularities, not a perfect circle, whereby the relative rotation of the push rod relative to the body 3 is restricted. In addition, the push rod 2 is supported toward the protruding position side by the main spring 12 inserted into the main body 17 from the lower end side.

Moreover, the upper cam 22 and the push rod 2 in which the annular 1st cam surface 21 which drives the locking piece 18 in the protruding position side of the push rod 2 is formed in the inner peripheral surface in the body 3 The lower cam 24 formed at the upper end of the annular second cam surface 23 for driving the engaging piece 18 is accommodated on the side of the retracted position. The upper cam 22 and the lower cam 24 drive the locking piece 18 to move the push rod 2 between the retracted position and the protruding position.

The upper cam 22 consists of a cylindrical member to which the push rod 2 is fluidly fitted. Moreover, the 1st cam surface 21 is comprised by the vertical groove | channel 31 formed as the level | step difference in the inner peripheral surface of the upper cam 22, and two triangular projections 32 and 33 (refer FIG. 4 and FIG. 5). have. In addition, the upper cam 22 is lowered through the sleeve 35 by the sub spring 34 accommodated in the head 4 of the body 3 in the state surrounding the push rod 2 as shown in FIG. The lower cam 24 side. In the center of the sleeve 35, a through hole 35a (see Fig. 1) having the same shape as the through hole 4a is formed.

The lower cam 24 is composed of a cylindrical member into which the spring retaining rod 11 and the main spring 12 are fitted to be movable. Moreover, the 2nd cam surface 23 is comprised by the two convex parts 41 and 42 and the two longitudinal grooves 43 and 44 (refer FIG. 4 and FIG. 5) formed in the upper edge of the lower cam 24, have. The lower cam 24 is disposed below the upper cam 22 so that its second cam surface 23 faces the first cam surface 21 of the upper cam 22, and the flange portion 45 of the closure member 8 is provided. Is supported. In addition, the plurality of restricting pieces 46 formed on the outer circumferential surface of the lower cam 24 are respectively inserted into the plurality of cutouts 47 formed on the lower edge of the upper cam 22, thereby allowing the upper cam 22 and The relative rotation of the lower cam 24 is regulated.

Next, the operation of the pressing apparatus constructed as described above will be described with reference to FIGS. 4A to 4E and 5A to 5D.

4A to 4E and 5A to 5D are exploded views of the upper cam 22 and the lower cam 24, in particular showing a part of the first cam surface 21 and the second cam surface 23 in a virtual plane. 4A to 4E show the operation of the push rod 2 moving from the protruding position to the retracted position, and FIGS. 5A to 5D show the operation of the push rod 2 moving from the retracted position to the protruding position. 4A to 4E and 5A to 5D show a state in which the engaging piece 18 of the push rod 2 is guided and moved to the first cam surface 21 and the second cam surface 23 for convenience of explanation. In practice, however, the engaging piece 18 (push rod 2) moves only in the up and down direction, and the first cam surface 21 and the second cam surface 23 are formed of the upper cam 22 and the lower cam 24. It rotates by the rotation operation (it moves to the left-right direction in FIG. 4, FIG. 5).

The first cam surface 21 is formed by arranging a plurality of vertical grooves 31 and two triangular projections 32 and 33 serving as structural units thereof. The projection part 32 has two inclined surfaces 32a and 32b, and the projection part 33 has two inclined surfaces 33a and 33b. The 2nd cam surface 23 is formed by arranging two convex parts 41 and 42 and two longitudinal grooves 43 and 44 which become the structural unit. The locking piece 18 of the push rod 2 is held in the guide gap G formed between the first cam surface 21 and the second cam surface 23.

4A shows a case where the push rod 2 is in the protruding position, and the locking piece 18 is in a state of being caught by the upper portion (bottom surface) of the longitudinal groove 31 of the upper cam 22. The vertical grooves 31 are arranged opposite to the inclined surface 41a formed at the top of the convex portion 41 in the axial direction (up-down direction in FIG. 4A). At this time, since the holding force of the subspring 34 (refer FIG. 3) is set small compared with the holding force of the main spring 12, the upper cam 22 has the engaging piece 18 (namely, the main spring ( 12) it is moved upward to the upper limit position by the finger force}.

When the push rod 2 is moved from the protruding position of FIG. 4A to the retracted position, the operator first pushes down the push rod 2 in response to the holding force of the main spring 12. As a result, as shown in FIG. 4B, the locking piece 18 moves downward along the inside of the vertical groove 31 so that the lower end thereof comes into contact with the inclined surface 41a of the convex portion 41. Thereafter, the locking piece 18 slides downward along the inclined surface 41a as shown in Fig. 4C. At this time, the upper cam 22 is supported by the sub spring 34 to be lowered by the release of the crimp by the main spring 12 and moves to the lower limit position.

Here, in the guide gap G, as shown in FIG. 4B, the part between the top part of the projection part 32 and the inclined surface 41a of the convex part 41 which opposes this can pass through the catching piece 18. FIG. The narrow portion N1 smaller than the width can be formed. Therefore, when the engaging piece 18 passes through the narrow part N1, the upper cam 22 is moved upward once against the holding force of the subspring 34 so that this narrow part N1 may open | release. After the locking piece 18 passes the narrow portion N1, the upper cam 22 moves back to the lower limit position as shown in Fig. 4C.

As described above, when the engaging piece 18 passes through the narrow portion N1, a click sound is generated and a change in reaction force received by the operator from the push rod 2 side (that is, the engaging piece ( 18) A feeling of click arises by the increase and decrease of reaction force before and after passing this narrow part N1.

Then, the engaging piece 18 is accommodated in the longitudinal groove 43 of the lower cam 24, as shown in FIG. 4D. Subsequently, when the operator releases the push rod 2, the locking piece 18 is raised to abut on the inclined surface 32b of the protrusion 32, and then slides upward along the inclined surface 32b. do. Finally, as shown in FIG. 4E, the engaging piece 18 is maintained at the boundary between the protrusions 32 and 33 of the upper cam 22, and the movement of the push rod 2 to the retracted position is completed. At this time, the upper cam 22 is moved upward by the locking piece 18 and moves to the upper limit position.

On the other hand, when the push rod 2 is moved from the retracted position of FIG. 4E to the protruding position, the operator pushes the push rod 2 down again in response to the holding force of the main spring 12. As a result, as shown in FIG. 5A, the locking piece 18 moves downward so that its lower end abuts against the inclined surface 42a of the convex portion 42. Thereafter, the locking piece 18 slides downward along the inclined surface 42a as shown in Fig. 5B.

Here, in the guide gap G, as shown to FIG. 5A, the part between the top part of the projection part 33 and the inclined surface 42a of the convex part 42 which opposes this can pass through the catching piece 18. FIG. The narrow part N2 smaller than the width | variety which can be comprised is comprised. Therefore, when the engaging piece 18 passes through the narrow part N2, the upper cam 22 is moved to the upper side once so that the narrow part N2 may spread | open like the said narrow part N1. After the locking piece 18 passes the narrow portion N2, the upper cam 22 moves to the lower limit position again as shown in Fig. 5B. As described above, when the engaging piece 18 passes through the narrow portion N2, a click sound and a feeling of click are generated as in the case of the narrow portion N1.

Thereafter, the locking piece 18 is accommodated in the longitudinal groove 44 of the lower cam 24 as shown in Fig. 5C. Subsequently, when the operator releases the push rod 2, the locking piece 18 is raised to abut on the inclined surface 33b of the protrusion 33, and then slides upward along the inclined surface 33b. do. Finally, as shown in FIG. 5D, the engaging piece 18 is held in the longitudinal groove 31 of the upper cam 22, and the movement to the protruding position of the push rod 2 is completed.

In addition, the closing operation and opening operation of the fuel lid R are executed by the movement operation of the above-mentioned piezoelectric apparatus 1. That is, in Figs. 4A to 4D, the operator pushes down the push rod 2 through the fuel lid R (shown in solid line in Fig. 2) in the open state. As a result, as shown by the dashed-dotted line in Fig. 2, the fuel lead R is blocked. 5A to 5D, the operator pushes down the push rod 2 through the fuel lid R in the closed state. As a result, the fuel lid R is opened again.

In the piezoelectric device 1 having the above-described configuration, when the locking piece 18 passes through the narrow portions N1 and N2 of the guide gap G, the upper cam 22 resists the holding force of the subspring 34 and narrows it. Since it is set as the structure which displace | displaces upwards so that the parts N1 and N2 may spread | open, it can generate a click sound and a click feeling, when an operator operates the push rod 2, and a feeling of operation improves.

In addition, since the holding force of the subspring 34 holding the upper cam 22 downward is less than the holding force of the main spring 12 holding the push rod 2 upward. When the operator operates the push rod 2, there is also an advantage that smooth rotation of the upper cam 22 and the lower cam 24 is not impeded.

In addition, since the upper cam 22 and the lower cam 24 are rotated in the pressing apparatus 1, the upper cam 22 and the lower cam 24 are increased even if the holding force of the main spring 12 is increased. There is also an advantage that the required driving force can be easily secured without hindering the smooth rotation of the wheel.

Although this invention was demonstrated in detail based on the specific embodiment, the said embodiment is only an illustration to the last, and this invention is not limited by the said embodiment. For example, the pressing apparatus according to the present invention can be used to drive any object, not just a fuel lid. The operation of opening the narrow portion when the engaging piece passes the narrow portion is not limited to the above-described movement of the upper cam, but can also be realized by the movement of the lower cam or the elastic deformation of the upper cam or the lower cam itself.

1-Pusher 2-Push Rod
3-body 6-plate member
6a-mounting hole 8-closing member
12-Main spring (first fingering means) 18-Hanging piece (cam follower)
21-First cam face 22-Upper cam (projection side cam)
23-2nd cam face 24-Lower cam (retraction side cam)
31-vertical groove 32,33-protrusion
34-subspring (second fingering) 41,42-convex
43,44-Groove G-Guide Clearance
N1, N2-Narrow R-Fuel Lead

Claims (3)

As a pressing device (1) having a push-push mechanism for switching the push rod (2) to the retracted position and the protruding position,
A cam follower 18 formed on the push rod 2,
A protruding side cam 22 having an annular first cam surface 21 for driving the cam follower 18 on the protruding position side of the push rod 2;
An annular second cam surface 23 disposed opposite to the first cam surface 21, and the second cam surface 23 is the cam follower 18 on the inlet position side of the push rod 2; An inlet side cam 24 for driving the
The push rod 2 protrudes in the state where the cam follower 18 is held in the guide gap G formed between the first cam surface 21 and the second cam surface 23 at the time of its movement. It is possible to rotate relative to the side cam 22 and the inlet side cam 24,
The guide gap G is formed with narrow portions N1 and N2 smaller than a width through which the cam follower 18 can pass, and at least one of the protruding side cam 22 and the inlet side cam 24. One side is characterized in that the cam follower is displaced so that the narrow portion (N1, N2) is opened when passing through the narrow portion (N1, N2) of the guide gap (G).
The method according to claim 1,
First gripping means 12 for gripping the push rod 2 toward the protruding position;
It further comprises a second holding means 34 for holding one side of the protruding side cam 22 and the inlet side cam 24 toward the other side,
And the second gripping means (34) have a smaller gripping force than the first gripping means (12).
The method according to claim 1 or 2,
And the protruding side cam (22) and the retracting side cam (24) rotate when the push rod (2) moves between the protruding position and the retracting position.

Images