JP2513120Y2 - Hook type cover lock structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a latch-type cover lock structure for latching a cover or the like to a housing or the like.

<Prior Art> A conventional latch type cover lock structure will be described with reference to a schematic explanatory view shown in FIG. 4 and an enlarged view of an A portion in FIG. 4 shown in FIG.

As shown in the figure, in the conventional latch type cover lock structure 41, the lock body 3 is provided inside the side plate 2a of the cover 2. The lock body 3 is made of an elastic body. A claw portion 4 is provided at the tip of the lock body 3 on the cover 2 side. Side 4a of claw 4
Is formed with a taper.

 Further, the housing 10 is provided with a hook hole 11.

Next, the operation of the latch-type cover lock structure 41 having the above-described structure
It will be described with reference to the drawings.

First, the cover 2 is bent inward as shown by a chain double-dashed line in FIG. 4, and the lock body 3 is inserted into the hook hole 11. Then, as shown in FIG. 5, the claw portion 4 is hooked on the peripheral edge portion 11 a of the hooking hole 11, and the cover 2 is hooked on the housing 10.

To remove the cover 2 from the housing 10, the side plate 2a is pressed inward to bend the cover 2. Then, the claw portion 4 is fixed to the hook hole 11
And the lock body 3 is pulled out from the hook hole 11.

<Problems to be Solved by the Invention> However, in the case of the conventional hook-type cover lock structure, in the case of a large cover, the entire cover is bent and the claw portion comes out of the hook hole.

Further, various structures have been proposed in order to secure the engagement of such a large cover, but all of them have caused operability and an increase in the number of parts.

For example, in the "lock device" described in Japanese Utility Model Laid-Open No. 59-95671, it is necessary to push the operation knob along the frame in order to mount and lock the movable piece in the square hole.

On the other hand, in order to release the locked state, the cover must be pulled out while pulling the operation knob in the opposite direction to the above.

In any case, the operation of arranging (removing) the cover on the frame and the operation of pushing (pulling) the operation knob were required.

Moreover, because of such an operation, the configuration is complicated and the number of parts is increased.

<Means for solving the problem> The present invention has been made to solve the above problems,
The feature is that in a cover lock structure that locks the cover on the housing by a lock body formed on the cover and a biasing means attached to the lock body, the lock body is provided on the inner surface of the side plate of the cover. It is formed by a mounting part to be mounted and a claw part projecting upward from the upper end of the side plate from this mounting part, and the claw part is formed on the side plate side and has a tapered side surface in a state of narrowing toward the tip of the claw part. The biasing means is provided on the side of the lock body opposite to the side plate, one end of which is attached to the tip of the claw portion, the other end of which is provided on the lower end side of the attachment portion and which spreads from one end to the other end. The present invention relates to a latch-type cover lock structure, which is characterized by being formed in a closed state.

<Action> The lock body has its tip protruding above the upper end of the side plate,
Moreover, since the whole is formed in a substantially pointed shape, it can be easily inserted into the hook hole by pressing the side plate.

Further, since the biasing means is wider than the lateral width of the hooking hole from the tip end side toward the cover side, the claw portion always presses the peripheral edge side of the hooking hole in the hooking state.

On the other hand, when pulling out, the hooked state can be easily released by pressing the side plate contrary to the above.

<Embodiment> A first embodiment and a second embodiment of the present invention will be described with reference to the drawings.

A first embodiment will be described with reference to an assembly perspective view shown in FIG. 1 and a transverse sectional view shown in FIG.

As shown in the figure, the latch type cover lock structure 1 is formed by a lock body 3 and a biasing means 6 inside the side plate 2a of a cover 2 composed of a side plate 2a and a substrate 2b.

The lock main body 3 is made of a material having a high elasticity at least at its engaging portion, and as in this example, the lock body 3 protrudes upward from the mounting portion 3a attached to the inner surface side of the side plate 2a and the upper end 2c of the side plate 2a (see the example of FIG. It is formed by the claw portion 4 in a state in which it is projected toward the side of the housing that is locked as described above.

Of the projecting portion of the claw portion 4, a tapered side surface 4a is formed on the side plate 2a side so as to become thinner toward the tip of the claw. Between the taper side surface 4a and the mounting portion 3a and the side edge 2a
A latching groove 4b is formed above the upper end (in the drawing) of the.

The locking groove 4b is a cutout in the lateral direction of the lock body 3, and the height of the locking groove 4b is the case 10 in which the locking hole 11 is formed as shown in the figure.
Greater than the thickness of.

In addition, the mounting groove 5 is inserted in a state where it penetrates the lock body 3 in the longitudinal direction.
Is formed. That is, the fixing portion 7 of the biasing means 6, which will be described later, is inserted into the mounting groove 5.

The urging means 6 is formed by bending a strip-shaped spring plate material and forming one side as the fixed portion 7 and the other side as an elastic portion 8 arranged on the side opposite to the side plate 2a.

Since the fixing portion 7 is inserted into the mounting groove 5 as described above, its width is smaller than the lateral width of the mounting groove 5. The elastic portion 8 is arranged such that one end thereof is attached to the tip end side of the claw portion 4 and the other end is widened toward the lower end of the attachment portion 3a, that is, the substrate 2b side,
The tip of the column portion 9 continuous with the elastic portion 8 is in contact with the lower end of the mounting portion 3a.

The lock body 3 and the urging means 6 having the above-described structure form a cover lock structure 1 in which the claw portion 4 side has a substantially pointed shape.
The pointed tip formed by the tapered side surface 4a and the elastic portion 8 is a casing.
The width is smaller than the lateral width d of the retaining hole 11 provided in
The size of the lower end side of the front end formed by 4a and the elastic portion 8 is larger than the lateral width d and the thickness is smaller than the vertical width e of the retaining hole 11.

In such cover lock structure 1, the fixing portion 7 of the biasing means 6 is provided.
Is mounted in the mounting groove 5 of the lock body 3, and the tip side of the fixing portion 7 is bent so that the bent tip abuts on the inner surface of the side plate 2a, while the tip of the column portion 9 is mounted on the mounting portion 3a as described above. Since it is in contact with the lower end, the biasing means 6 is securely attached to the lock body 3 by the contact reaction force at the bent tip of the fixed part 7, and the elastic part 8 has the spring characteristic and the tip part of the support part 9 abuts. The claw portion 4 is urged by a predetermined elastic force in a direction opposite to the direction in which the elastic portion 8 is present by the reaction force due to.

Next, the operation of the latch type cover lock structure will be described with reference to FIGS. 1 and 2.

First, the side plate 2a is pressed in the direction of arrow A to bend the substrate 2b of the cover 2 inward. Hook hole at the tip of cover lock structure 1
When inserting into 11, the tapered side surface 4a of the claw portion 4 and the elastic portion 8
Is formed in a substantially pointed shape, so that it is easy to face the inside of the hook hole 11, and if the pressure of the side plate 2a is released, the peripheral edge of the hook hole 11
11a is locked in the locking groove 4b of the claw 4.

In this hooked state, the elastic portion 8 is the peripheral portion of the hook hole 11.
Since it comes into pressure contact with 11b, it flexes by receiving the reaction force from the peripheral portion 11b, and the repulsive force urges the retaining groove 4b of the claw portion 4 so as not to come off the peripheral portion 11a. Therefore, the cover 2 is securely hooked to the housing 10.

To remove the cover 2 from the housing 10, the side plate 2a is pressed in the direction of arrow A to bend the substrate 2b of the cover 2 in the same manner as described above, the elastic portion 8 bends, and the peripheral portion 11a extends from the retaining groove 4b. It comes off and claw part 4
The engagement state between the engagement hole 11 and the engagement hole 11 is released, and as a result, the cover 2 can be removed from the housing 10.

Next, a second embodiment will be described with reference to the cross sectional view shown in FIG.

As shown in the figure, in the latch type cover lock structure 21, the lock body 3 is integrally provided inside the side plate 2a of the cover 2 as described above. The structure and the mounting state of the lock body 3 with the side plate 2a are substantially the same as those of the first embodiment (FIG. 2).

In such lock body 3, the tapered side surface 4a of the claw portion 4
Biasing means 26 is provided on the opposite side.

The biasing means 26 is formed of a beam portion 27 and an elastic portion 28.

One end side of the beam portion 27 is attached to the tip of the claw portion 4 of the lock body 3 via a pivotal support point 27a, while the other end side is interposed between the beam portion 27 and the attachment portion 3a of the lock body 3. It is attached to the long elastic portion 28. Therefore, the beam portion 27 is expanded from the tip of the claw portion 4 toward the substrate 2b, and the tapered side surface 4a of the claw portion 4 and the one end side of the beam portion 27 are substantially pointed.

The sizes of the lock body 3 and the beam portion 27 with respect to the retaining hole 11 are the same as those in the above-described embodiment.

The elastic portion 28 is installed on the beam portion 27 at a rotation support point.
It is preferable that the distance L1 between 27a and a hook hole contact point described later is set to be shorter than the distance L2 between the hook hole contact point and the elastic portion mounting position 27c. Further, although a coil spring is used for the elastic portion 28, other elastic bodies may be used as a matter of course.

 Next, the operation of the latch type cover lock structure 21 will be described.

First, the side plate 2a is pressed in the direction of arrow A to bend the substrate 2b of the cover 2. Then, the pointed tip of the lock body 3 is engaged with the locking hole 11
And then push it further into the hook groove 4b so that the peripheral edge of the hook hole 11
Hook 11a. At this time, the beam portion 27 comes into contact with the peripheral portion 11b of the retaining hole 11 and is pressed in the direction of arrow B. Therefore, since the beam portion 27 presses the elastic portion 28, the elastic portion 28 is pressed. As a result, the repulsive force of the elastic portion 28 causes the beam portion 27 to move to the hook hole contact point 27b.
Is used as the fulcrum, and the rotation support point 27b is always pressed in the direction of arrow C. Therefore, the engaging groove 4b is prevented from coming off from the peripheral portion 11a of the engaging hole 11, and the cover 2 is reliably engaged with the housing 10.

On the other hand, to remove the cover 2 from the housing 10, the side plate 2a is the same as above.
The cover 2 can be easily removed from the housing 10 by pressing the outer surface side of the to release the engagement state between the peripheral edge portion 11a and the engagement groove 4b.

<Effects of the Invention> As described above, according to the present invention, the lock body and the biasing means have the tips formed in a pointed shape, so that the lock body can be easily inserted into the hook hole. When the claws are locked, the biasing means always presses the claws of the lock body against the locking holes.

Therefore, it is not easy to hook and release the hook, and the claw portion can be reliably prevented from coming off the hook hole. Therefore, even a large cover can be sufficiently hooked on the housing.

Further, since the number of constituent parts is composed of the claw portion and the biasing means, it can be greatly reduced as compared with the conventional one.

[Brief description of drawings]

1 is an assembled perspective view of the first embodiment, FIG. 2 is a cross-sectional view of the first embodiment, FIG. 3 is a cross-sectional view of the second embodiment, and FIG. FIG. 5 is an enlarged view of a portion A in FIG. 1,21 …… Latch type cover lock structure, 2 …… Cover, 2a …… Side plate,
2b …… Board, 3 …… Lock body, 3a …… Mounting part, 4 …… Claw part,
4a …… Tapered side, 4b …… Latch groove, 5 …… Biasing means mounting groove, 6,26 …… Biasing means, 7 …… Fixing part, 8,28 …… Elastic part, 9…
… Supporting part, 10 …… Case, 11 …… Hatching hole, 27 …… Beam part.

Claims (1)

(57) [Scope of utility model registration request] 1. A cover lock structure for locking a cover to a casing by a lock body formed on the cover and a biasing means attached to the lock body, wherein the lock body is mounted on an inner surface of a side plate of the cover. And a claw portion projecting upward from the upper end of the side plate from the mounting portion, the claw portion being tapered toward the side plate and toward the tip of the claw portion. The urging means is provided on the side of the lock body opposite to the side plate, one end of which is attached to the tip of the claw portion, and the other end of which is provided on the lower end side of the attaching portion. The hook-type cover lock structure is characterized in that it is formed so as to spread from the to the other end.