JP3472760B2 - Locking connection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic plate provided on one member by engaging an engaging projection formed on one side of the elastic plate with an engaging edge provided on the other member. Two
For example, it belongs to the technical field of a locking connection structure for connecting two members to each other to prevent separation.

[0002]

2. Description of the Related Art These two members are connected to each other by engaging a locking projection formed on one surface of an elastic plate provided on one member with a locking edge provided on the other member. Locking connection structures are known.

[0003]

In the locking connection structure, when the locking projection of the elastic plate (so-called locking claw) is locked to the locking edge (for example, the edge portion of the hole or the edge portion of the member). , The elastic force of the elastic plate is used. For example, when the locking projection is brought closer to the locking edge and the locking projection comes into contact with the locking edge, the elastic plate is elastically deformed by the reaction force exerted from the locking edge,
When the elastic plate is further moved forward and the locking projection gets over the locking edge, the elastic plate elastically returns, so that the locking projection locks on the locking edge.

The two members are connected, for example, by this locking. Further, after that, for example, a force is exerted on the locking projection to elastically deform the elastic plate, whereby the locking can be released and the two members can be separated. For this reason, when it is not desirable to separate the two members or when it is not necessary to separate them, there is a risk that the elastic plate is elastically deformed as described above and the locking is released by malicious intent, for example. is there.

The present invention provides a locking connection structure capable of preventing the locking from being released due to such negligence or malicious intent.

[0006]

According to a first aspect of the present invention, there is provided a locking connection structure according to a first aspect of the present invention, wherein a locking plate is formed on one side of an elastic plate provided on one member. In the locking connection structure for preventing the separation of the two members by locking the protrusion to the locking edge provided on the other member, the elastic plate is connected to the member including the locking edge. A lock position that presses the back surface of the elastic plate in a state where the locking projection is locked to the locking edge and a release that does not apply the pressing force to the elastic plate around an axis parallel to the extending direction of Since it has a locking body that can be rotationally displaced to the position, if the locking projection is locked to the locking edge and then the locking body is moved to the locked position, the elastic plate elastically moves toward the unlocking side due to the pressing force. It can be prevented from being deformed. Further, the locking can be strengthened by the pressing force. To release the lock, the locking body may be displaced to the release position. The locking body is, for example, two members.
It can be configured so that it is detached from the
Also, attach it to a member equipped with an elastic plate.
Although it is possible, if it is disconnected, it may be lost.
There is it, and the structure is difficult to attach to the member on the elastic plate side.
There is a risk that it will become complicated. Therefore, lock as above
A configuration is preferred in which the body is connected to a member with locking edges.

Note that the lock position and the release position are not limited to one specific position, respectively, and the lock position can exert a sufficient pressing force to prevent elastic deformation of the elastic plate toward the release side. The position within the range and the release position are positions within the range that do not hinder elastic deformation of the elastic plate toward the release side.

Each of the two members may have a one-part construction, or a plurality of parts may be adhered or connected by bolts to form a series structure. According to a second aspect of the present invention, there is provided the locking connection structure according to the first aspect, further comprising stopper means for stopping the locking body at an optimum locking position.

The optimum lock position in claim 2 is
The most suitable position within the range of the lock position described in claim 1 can exert a pressing force. The provision of the stopper means allows the locking body to be stopped at its suitable locking position, so that elastic deformation of the elastic plate toward the release side can be prevented very well, and locking can be made extremely strong. .

According to a third aspect of the present invention, there is provided a locking connection structure according to the first aspect.
Alternatively, in the locking connection structure described in 2, since the locking body is provided with a groove for inserting a tool or the like for rotationally displacing the locking body, for example, a tool such as a screw driver, a coin, or a simple metal piece. An appropriate tool (an object that is not a tool originally but can be used as a tool in this case) can be inserted into the groove, and force can be applied to the tool to rotate the locking body. That is, the work of moving the lock body to the lock position or the release position can be performed easily.

According to a fourth aspect of the present invention, there is provided the locking connection structure according to the third aspect.
In the locking connection structure described above, since the width of the groove is set to match the thickness of one of the coins accepted in Japan, the coin can be used as a tool to rotate the locking body. Tools such as screwdrivers are not always at hand except at factories and work sites, and usually they have to be taken out of a tool box or the like. However, if the groove of the locking body is set to have a width that matches any thickness of coins accepted in Japan, the coin at hand can be used, and it is extremely convenient without the need to take out the tool.

The width matching the thickness of the coin means a width in which the coin can be inserted without rattling. Also,
The depth of the groove can be appropriately determined, but it is advisable to try (experimentally) determine the depth to which the coin can be inserted to facilitate the work. 500 yen, 100 yen, 50 yen,
You can choose any type of coin from 10 yen, 5 yen, 1 yen, but it is thought that everyone has it, and considering the size that it is easy to hold and twist in hand, 10 yen coin is Seems best.

[0013]

According to a fifth aspect of the present invention, there is provided the locking connection structure according to the first aspect.
In the locking connection structure according to any one of claims 1 to 4, the locking shaft has a rotation shaft provided with a pull-out preventing projection protruding in a radial direction, and the rotation shaft of the rotation shaft provided on a member having the locking edge. It is characterized in that the bearing hole is provided with a projecting portion that allows the slip-out preventing projection to pass through only when the locking body is at the attaching / detaching position.

When the lock body is attached (assembled) to the member having the locking edge, the rotary shaft of the lock body may be inserted into the bearing hole in accordance with the attachment / detachment position. After that, the lock body is not separated unless the lock body is set to the attachment / detachment position. Also,
For example, when it is necessary to remove the locking body for replacing the locking body, the turning shaft may be pulled out from the bearing hole with the locking body in the attaching / detaching position. In other words, it is easy to assemble and disassemble, and there is no risk of it coming off during use.

According to a sixth aspect of the present invention, there is provided a locking connection structure according to the fifth aspect.
In the locking connection structure described above, a recess is provided on a surface of the locking body on the side of the member including the locking edge, and the member including the locking edge includes the recess when the locking body is in the optimum locking position. A lock position protrusion to be accommodated in, and the stopper means is constituted by the recess and the lock position protrusion,
Further, the member provided with the locking edge is provided with a release position protrusion that is housed in the recess before the lock body is rotationally displaced from the lock position to the attachment / detachment position before reaching the attachment / detachment position. It is characterized by

When the locking body is at the optimum lock position, the lock position projection is housed (for example, fitted) in the recess, so that the rotation of the locking body is restricted (stopper means). On the other hand, when the locking body is rotationally displaced from the optimum locking position to the attachment / detachment position, the release position protrusion is housed (for example, fitted) in the recess before the locking body reaches the attachment / detachment position. The rotation of the locking body is stopped. of course,
It can also be placed in the attachment / detachment position if it is rotated more strongly.

That is, it is easy to bring the locking body to a suitable locking position by the stopper means, and it is prevented by the releasing position projection that the locking body is excessively rotated when the locking body is in the releasing position and is in the detaching position. . The shapes of the recess, the lock position protrusion, and the release position protrusion need to be such that it is not difficult to fit (eg, fit) in the recess and that the released state (eg, fit) is not difficult. . As a concrete example, the lock position protrusion and the release position protrusion are hemispherical (it is not necessary to be an exact hemisphere, but generally called a hemisphere) or a semi-cylindrical shape, etc. The contacting portion may be formed into a curved surface or an inclined surface, and the inner surface shape of the recess may be matched with this.

When the lock position projection is housed in the recess, the release position projection is housed in the recess, and when the lock position projection is detached from the recess, the locking body is elastically deformable as much as the height of the projection. You can leave it.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to Examples of the present invention.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the locking connection structure of this embodiment comprises a first member 10 corresponding to one member, a second member 20 corresponding to the other member, and a locking body 30. It should be noted that this embodiment is an example for explaining the present invention in a simple manner, and actually, the structures and shapes of the first member 10 and the second member 20 are various.

An elastic plate 12 is provided upright on the bottom 11 of the first member 10, and a locking projection 13 is provided at the tip thereof. A loose fitting hole 14 is provided at the center of the bottom 11, and a wall 15 is provided at the outer edge. The first member 10 is an injection-molded product of synthetic resin, for example, ABS resin, and the elastic plate 12 can be elastically deformed like a leaf spring with the base portion (connection portion with the bottom 11) as a fulcrum.

The second member 20 has a rectangular locking projection 13 on the second member 20.
An insertion hole 21 having a size that allows passage is provided, and a locking block 22 is provided adjacent to the insertion hole 21. Note one side of the locking block 22 of the insertion hole 21
It is a series with the inside . Although details will be described later, a portion of the upper surface 22a of the locking block 22 on the side of the insertion hole 21 functions as a locking edge.

A bearing hole 23 is provided at the center of the second member 20.
The pair of protrusions 24 are provided above and below the bearing hole 23 in FIG. Details will be described later,
When the locking projection 13 is locked to the locking block 22 to connect the first member 10 and the second member 20, the loose fitting hole 14 and the bearing hole 23 become substantially coaxial.

A lock position protrusion 25 and a release position protrusion 26 are provided on the surface of the second member 20. The lock position protrusion 25 and the release position protrusion 26 are located on the same circle centered on the axis of the bearing hole 23, and the central angle of the sector formed between the lock position protrusion 25 and the release position protrusion 26 is 7
It is 5 degrees. The lock position protrusion 25 and the release position protrusion 26 are hemispherical as shown in an enlarged view in FIG.

The operating portion 31 of the locking body 30 is partitioned by a groove 32 into a triangular portion 33 and a square portion 34. Triangular part 3
The top 33a of 3 has an arcuate curved surface, and the end of the square portion 34 also has an arcuate curved surface. Further, a dome-shaped concave portion 36 is provided on the inner side surface (the surface facing the second member 20 side) of the square portion 34 as shown in FIG.

In the case of this embodiment, the width of the groove 32 is slightly larger than the thickness of the 10-yen coin. Also, as shown in FIG.
Bottom 32a has an arc shape matching the outer circumference of the 10-yen coin. Therefore, a part of the 10-yen coin can be inserted into the groove 32 without loosening. The center of the groove 32 coincides with the axis of the rotating shaft 35, and the rotating shaft 35 is provided with a pair of pull-out preventing projections 37 protruding in the radial direction.

The diameter of the rotary shaft 35 is slightly smaller than the inner diameter of the bearing hole 23, and the distance from the slip-out preventing projection 37 to the operating portion 31 (the length of the portion of the rotary shaft 35 where the slip-out preventing projection 37 does not exist) is: It is slightly larger than the depth of the bearing hole 23. The outer dimension of the slip-out preventing projection 37 is slightly smaller than the inner surface dimension of the protrusion 24. Therefore, the turning shaft 35 can be inserted into the bearing hole 23 by aligning the pair of pull-out preventing projections 37 with the corresponding projecting portions 24,
When completely inserted (until the operating portion 31 comes into contact with the second member 20), the slip-out preventing projection 37 comes out of the bearing hole 23, so that the rotating shaft 35 (that is, the locking body 30) can be rotated. Further, even if the locking body 30 is rotated, if the position of the slip-out preventing protrusion 37 does not match the protrusion 24, the rotation shaft 35
Can not be extracted.

In this way, the locking body 30 is attached to the second member 20.
Then, the locking body 30 is rotated to a position where the release position projection 26 fits into the recess 36 (release position). It is not essential to set this position, but if it is set to the release position, the locking displacement of the locking body 30 is prevented by the fitting of the recess 36 and the release position projection 26, so that the subsequent work is easy. . However, at this stage, the locking body 30
Should not be a position (lock position) where the lock position protrusion 25 fits into the recess 36. In addition, the removal prevention protrusion 37
The position (the attachment / detachment position) where is aligned with the protruding portion 24 is also not preferable.

After the locking body 30 is positioned as described above, the first member 10 and the second member 20 are brought close to each other, and the tip of the elastic plate 12 (that is, the locking projection 13) is inserted into the insertion hole 21. Then, first, the inclined surface of the locking projection 13 is inserted into the insertion hole 2
The elastic plate 12 is elastically deformed by its reaction force. When the insertion is continued as it is, the locking projection 13 moves forward from the inner surface of the insertion hole 21 while being in contact with the side surface of the locking block 22, and the elastic plate 12 also moves forward while being elastically deformed. When the locking projections 13 are further inserted and the side surfaces of the locking blocks 22 are passed, the force acting between the side surfaces of the locking blocks 22 and the locking projections 13 (the force deforming the elastic plate 12) is applied. Since it is released, the elastic plate 12 elastically returns and the locking projection 13 is locked to the edge portion of the upper surface 22a of the locking block 22, that is, the locking edge. This state is shown in FIG.
Shown in.

As a result, the first member 10 and the second member 20 can be connected. In this state, for example, when a force is applied to push the locking protrusion 13 from the locking block 22 side, the locking protrusion 13 is locked. The engagement between the protrusion 13 and the engagement block 22 may be released. Further, there is a possibility that the locking may be released by forcibly inserting a tool having a thin cutting edge such as a flat-blade screwdriver between the first member 10 and the second member and rotating the tool. Therefore, both members 10,
Twenty connections are not perfect.

Therefore, in the case of the present embodiment, the work for moving the locking body 30 to the lock position is performed from the state shown in FIGS. 2 (b) and 4. Specifically, 10 is provided in the groove 32 of the locking body 30.
A yen coin (which need not be this, but is as wide as possible with a similar thickness) is inserted and rotated in the clockwise direction in FIG. 4C.

When a force is applied to the locking body 30 to start the rotation, the fitting between the recess 36 and the release position projection 26 is released. At this time, the square portion 34 of the locking body 30 has the release position protrusion 2
Although it is elastically deformed by the height of 6, this elastic deformation is slight and easy.

When the rotation continues, the top 33a of the triangular portion 33
Contacts the back surface of the elastic plate 12 (the surface opposite to the protruding direction of the locking projection 13) and presses it. The pressing force is shown in Fig. 2 (c).
5 is the maximum setting in the state shown in FIG. Then, in the state shown in FIG. 2C and FIG.
6 and the lock position protrusion 25 are fitted together. That is, when the locking body 30 reaches the lock position, the recess 36 and the lock position protrusion 25 are fitted to each other to stop the rotation, and at that time, the locking body 30 presses the back surface of the elastic plate 12 with the maximum force (optimum). Lock position).

When fitting the recess 36 and the lock position protrusion 25, the square portion 34 of the locking body 30 is locked by the lock position protrusion 25.
It will be elastically deformed by the height of, but this elastic deformation is slight and easy. The pressing force of the locking body 30 presses the elastic plate 12 against the locking block 22, so that the elastic plate 12 is separated from the locking block 22, that is, to the side where the locking projection 13 and the locking block 22 are unlocked. Reliably prevent elastic deformation.

In the embodiment, the locking body 30 is the elastic plate 12.
The central portion of the elastic plate 1 is pressed.
The setting may be such that the tip of 2 (the portion behind the locking projection 13) is pressed. Further, the back surface may be set to be pressed over the entire length of the elastic plate 12. Such setting of the pressing position can be appropriately set depending on the purpose of use of the locking connection structure, the specific structure, the dimensional relationship, etc., as long as the locking projection 13 can be prevented from separating from the locking block 22.

In order to release the locking by the locking projection 13 for separating the first member 10 and the second member 20, for example, a 10-yen coin is inserted into the groove 32 of the locking body 30,
The top portion 33a of the triangular portion 33 may be removed from the back surface of the elastic plate 12 by rotating the counterclockwise direction in (c). When the locking body 30 is rotated about 75 degrees from the position of FIG. 5C, the recess 36 and the release position protrusion 26 are fitted to each other to stop the rotation of the locking body 30 as described above. This fitting prevents the locking body 30 from rotating too far to the position shown in FIGS.
0 does not accidentally fall out of the second member 20.
Further, since the locking body 30 is also prevented from rotating due to this fitting, it is not displaced, for example, in the lock position direction.

If the locking body 30 is to be removed from the second member 20, it may be rotated to the position shown in FIGS. 2 (a) and 3. In addition, FIG.
As shown in FIG. 5A and FIG.
The projecting length (passage length) is slightly smaller than the diameter of the loose fitting hole 14, and the slip-out preventing projection 37 slides on the inner surface of the loose fitting hole 14. Therefore, when the locking body 30 is rotated, the swinging of the rotating shaft 35 is prevented well, and the rotation operation of the locking body 30 is smoothed.

As described above, the locking connection structure of this embodiment is
By locking the locking protrusion 13 formed on one side of the elastic plate 12 provided on the first member 10 to the upper surface 22a of the locking block 22 provided on the second member 20, the first member 10 In the locking connection structure that connects the second member 20 and the second member 20, the elastic plate 12 in a state in which the locking protrusion 13 is locked to the upper surface 22a about an axis parallel to the extending direction of the elastic plate 12.
Since the locking body 30 that can be rotationally displaced between the lock position that presses the rear surface of the lock plate and the release position that does not exert a pressing force on the elastic plate 12, the locking projection 30 is locked to the upper surface 22a before the locking body 30 is locked. When is set to the lock position, the elastic plate 12 can be prevented from elastically deforming toward the unlocking side due to the pressing force. Further, the locking can be strengthened by the pressing force. To release the lock, the locking body 30 may be displaced to the release position.

In particular, since the concave portion 36 of the locking body 30 and the lock position projection 25 function as stopper means to stop the locking body 30 at a suitable locking position, the elastic deformation of the elastic plate 12 to the release side is very good. Can be prevented and the locking can be made extremely strong. Since the locking body 30 is provided with a groove 32 suitable for inserting a 10-yen coin, for example, by inserting a 10-yen coin or a tool having a similar plate thickness into the groove 32 and applying a force thereto. The locking body 30 can be rotated. That is, the work of moving the locking body 30 to the lock position or the release position can be performed easily. Moreover, the groove 3
Since 2 is a size that matches a 10-yen coin, a 10-yen coin can be used instead of a tool without a tool, etc.
Can be rotated. It is very convenient that anyone can hold a 10-yen coin, and that it is easy to hold and twist in your hand.

Since the locking body 30 is connected to the second member 20, there is no risk of loss, and the structure can be simplified as compared with the case where the locking body 30 is attached to the first member 10. Rotating shaft 35 of locking body 30
The pull-out preventing projection 37 that protrudes in the radial direction is provided in the bearing hole 23 provided in the second member 20, and the pull-out preventing projection 3
7 is provided, the protrusion 24 is provided so that when the locking body 30 is attached to the second member 20 (assembly), the pull-out prevention protrusion 37 is aligned with the protrusion 24 (in the attachment / detachment position) to rotate. The shaft 35 may be inserted into the bearing hole 23. After that, the slip-out preventing projections 37 are not separated unless they are aligned with the projecting portions 24. Also, for example, when it is necessary to remove the locking body 30 to replace it,
The rotary shaft 35 may be pulled out from the bearing hole 23 with the locking body 30 in the detachable position. In other words, it is easy to assemble and disassemble, and there is no risk of it coming off during use.

A release position protrusion 26 is provided on the second member 20, and when the locking body 30 is rotationally displaced from the lock position to the attachment / detachment position, the recess 36 and the release position protrusion 26 are fitted before reaching the attachment / detachment position. Since the setting is made to match, it is possible to prevent the locking body 30 from being inadvertently placed in the attaching / detaching position when the locking body 30 is rotated. Moreover, the locking body 30 can be maintained in the release position.

Although the embodiments of the present invention have been described above according to the embodiments, the present invention is not limited to the embodiments and various modifications can be made without departing from the gist of the present invention. Needless to say.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a locking connection structure according to an embodiment.

FIG. 2 is a perspective view of the locking and connecting structure of the embodiment when the locking body is at the attaching / detaching position (a), the releasing position (b), and the locking position (c).

FIG. 3 is an explanatory view of the locking and connecting structure of the embodiment when the locking body is in the detachable position, and is a rear view (a), an AA cross-sectional view (b), a front view (c) and B, respectively. -B
It is sectional drawing (d).

FIG. 4 is an explanatory view when the locking body is in the release position in the locking connection structure of the embodiment, and is a rear view (a), an AA sectional view (b), a front view (c) and B, respectively. -B
It is sectional drawing (d).

FIG. 5 is an explanatory view when the locking body is in the lock position in the locking connection structure of the embodiment, and is a rear view (a), an AA sectional view (b), a front view (c) and B, respectively. -B
It is sectional drawing (d).

FIG. 6 is an enlarged view of a main part of the locking connection structure according to the embodiment,
4A is an enlarged view of FIG. 4B, and FIG. 5B is an enlarged view of FIG.

[Explanation of symbols] 10 First member (one member) 12 Elastic plate 13 Locking protrusion 14 loose fitting hole 20 Second member (other member) 21 insertion hole 22 Locking block 22a Upper surface (locking edge) 23 Bearing hole 24 Projection 25 Lock position protrusion (stopper means) 26 Release position protrusion 30 Locked body 32 grooves 35 rotation axis 36 recess (stopper means) 37 Fall-out prevention protrusion

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuji Oyama 460 Kawamiya-cho, Moriyama-ku, Nagoya, Aichi Prefecture Aiwa Light Co., Ltd. (72) Hideki Ogawa 460 Kawamiya-cho, Moriyama-ku, Nagoya City, Aichi Ltd. Aiwa Wright (56) Reference JP-A-9-32825 (JP, A) JP-A-6-173921 (JP, A) Actual development Sho-63-45207 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) F16B 21/04 F16B 5/07

Claims (6)

(57) [Claims] 1. The separation of the two members by locking a locking projection formed on one surface side of an elastic plate provided on one member to a locking edge provided on the other member. In a locking connection structure for preventing, the locking projection is locked to the locking edge about a shaft that is connected to a member having the locking edge and is parallel to the extending direction of the elastic plate. A locking connection structure comprising a locking body that can be rotationally displaced between a locked position that presses the back surface of the elastic plate in a state and a release position that does not apply the pressing force to the elastic plate. 2. The locking connection structure according to claim 1, further comprising stopper means for stopping the locking body at an optimum locking position. 3. The locking connection structure according to claim 1, wherein the locking body is provided with a groove into which a tool or the like for rotationally displacing the locking body is inserted. Stop connection structure. 4. The locking connection structure according to claim 3, wherein the width of the groove is a width that matches any thickness of coins accepted in Japan. 5. The locking connection structure according to any one of claims 1 to 4, wherein the locking shaft has a rotation shaft, and the locking shaft has a pull-out preventing projection protruding in a radial direction.
And a bearing for the rotating shaft provided on a member having the locking edge.
Only when the locking body is in the attaching / detaching position,
The locking connection structure is characterized in that a protrusion is provided to allow the slip-out prevention protrusion to pass through . 6. The locking connection structure according to claim 5, wherein a recess is provided on a surface of the locking body on the member side having the locking edge.
However, the locking body is optimal for the member having the locking edge.
Lock position that is stored in the recess when it is in the lock position
By providing a protrusion, the recess and the lock position protrusion
The member that constitutes the stopper means and further includes the locking edge is set at the lock position.
When the locking body is rotationally displaced from the
A release position protrusion that is housed in the recess before reaching the attachment / detachment position.
A locking connection structure characterized by being provided .