JPH11350817A - Lock device of hinged door type cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock device of a hinged door type cover facilitating lock release operation of the cover and opening operation of the cover, giving no restrictions to a shape of the cover, and reducing manufacturing cost. SOLUTION: An inclined face 1a forming an acute angle for a surface 1b of a cover 1 is provided on the other end face of the cover 1 whose one end is fixed on a top face 2a of a case main body 2, and a pushbutton 31 which is inserted in the surface 1b of the cover so as to come in and out and is energized in the direction in which a tip protrudes is provided in the vicinity of the inclined face 1a. One end of a hook member fixed on a support shaft 37 in the cover 1 is energized in the direction in which it comes into pressure- contact with a rear end of the pushbutton 31, and a hooklike part 32a engaged with an engaging part 21 formed in the case main body 2 when the hook member 32 is turned in the direction of energization is provided at the other end of the hook member 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a hinged door cover, and more particularly, to a locking device provided on a hinged door cover such as a cover of a shield case used for a radio wave test.

[0002]

2. Description of the Related Art As described in Japanese Utility Model Laid-Open Publication No. 3-43780, a shield case used for a radio wave test has a cover on an upper surface of a case body of the shield case in order to easily put a device under test in and out. A hinged door that opens and closes the opening on the upper surface of the case body is provided, and when the cover is closed, the degree of adhesion between the cover and the case body is adjusted so that radio waves do not leak from the shield case. In order to raise the cover, a cover locking mechanism including a hook member for locking the cover in close contact with the case body and a push button for releasing the locking of the hook member is provided.

In the prior art described in the above publication, when a push button provided on a cover is pressed to open a cover for opening and closing a front panel of a desktop device, a hook of a hook member pushed by the push button is pressed. The engagement with the opening of the front panel is released, and the cover that can be opened is automatically folded down and opened by the weight of the lock mechanism.

That is, since the cover falls down under its own weight and opens when the push button is pressed, the hook-like portion of the hook member that moves in the falling direction together with the cover comes off from the opening in the front panel, and the hand is pressed after the push button is pressed. You can release the lock by releasing it.

[0005] However, as shown in FIG.
In the case of a hinged door type cover in which one end of the cover 1 is pivotally attached to the upper surface of the cover 1, the unlocked cover 1 is not opened by its own weight, but closed by its own weight, causing the following problem.

[0006]

A conventional door-type cover in which one end of a cover 1 is pivotally mounted on the upper surface of a case body 2 shown in FIG. 7 has the same structure as a lock mechanism 3 as shown in FIG. The case where the lock mechanism is provided will be described.

A lock device cover 36 is inserted into a hole passing through the upper surface of the cover 1, and the lock device cover 36
A flange 36a is provided around the outer peripheral surface of the upper end, a bottom wall 36c is provided at an intermediate portion of the cylindrical body 36b, and a male screw is screwed on the outer peripheral surface of the cylindrical body 36b.
To the cover 1.

The push button 31 inserted into the lock device cover 36 has a pressing surface 31a formed on the upper surface, and a pin portion 31b formed on the lower end portion passes through a hole provided on the bottom wall of the lock device cover 36. An inclined surface 31c is formed on the lower end surface of the pin portion 31b, and is urged in a direction protruding from the upper surface of the cover 1 by a compression spring 34 inserted into the lock device cover 36. Further, a stopper pin 38 for limiting the amount of protrusion is provided on a side surface of the push button 31.

Below the push button 31, a hook member 32 is pivotally mounted on a support shaft 37 that penetrates the lock device cover 36, and one end of an urging spring 33 wound around the support shaft 37 is connected to the lock device cover 36. The other end is pressed against the bottom wall and the other end is hook member 32.
Press against

Accordingly, the corresponding cam 32b formed at the upper end of the hook member 32 is pressed against the inclined surface 31c of the push button 31, and the hook-like portion 32a formed at the lower end of the hook member 32 is formed on the inner wall of the case body 2. It protrudes from the opening engaging portion 21 provided in the plate 22 and is urged in a direction to engage with the inner surface 22 a of the inner wall plate 22.

When the above-described lock mechanism 3 is provided,
When the pressing surface 31a of the push button 31 is pressed with a finger, the hook member 32 rotates clockwise about the support shaft 37, the hook-like portion 32a is detached from the opening engaging portion 21, and the cover 1 can be opened. However, since the cover 1 does not automatically open upward, when the finger is released from the pressing surface 31a of the push button 31, the hook member 32 rotates counterclockwise and returns to the locked state.

Therefore, in order to completely release the lock, a device for forcibly opening the cover 1 by a predetermined amount as shown in FIG. 8 which is a sectional view taken along the line YY of FIG. 7 is required.

That is, in the apparatus shown in FIG. 8, a coil spring cover 25 formed in a cylindrical body with a bottom wall is attached to the inner plate 22 of the case main body 2. The member 23 and the pressure receiving member 2
A coil spring 24 for urging the lock member 3 upward is provided, and when the lock of the lock mechanism 3 is released, the pin member 13 provided on the lower surface of the cover 1 is pushed up by a predetermined amount.

A handle 12 is provided on a side surface of the cover 1.
Are attached by screws 14 and the cover 1 is lifted by a predetermined amount, and then the handle 12 is grasped and the cover 1 is opened.

Therefore, the following problems have been left in the conventional lock device for the hinged door provided with the lock mechanism.

As the first problem, the cover 1 is pressed by pressing the push button 31 of the lock mechanism 3 and grasping the handle 12.
The operation of opening the cover 1 and the operation of opening the cover 1 are complicated because the operations for opening the cover 1 are performed separately.

As a second problem, since the handle 12 protrudes from the side surface of the cover 1, there is a problem that the shapes of a test operation unit and a display unit used for a radio wave test or the like are restricted.

Further, as a third problem, it is necessary to provide a cover push-up device as shown in FIG. 8 in addition to the lock mechanism 3, so that the manufacturing cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional door lock device, and the operation of unlocking the cover and opening the cover is easy, and the handle is provided on the side of the cover. It is an object of the present invention to provide a lock device for a door-type cover, which does not impose any restrictions on the shape of the cover because the parts and the like do not protrude, and does not require the provision of a cover lifting device or the like as in the related art. .

[0020]

According to the first aspect of the present invention,
A lock device for a hinged door cover, wherein an inclined surface that forms an acute angle with respect to the surface of the cover is provided on the other end surface of the cover whose one end is pivotally attached to the upper surface of the case main body. A push button is provided so as to be able to protrude and retract from the surface of the cover and is urged in a direction in which the tip protrudes, and one end of a hook member pivotally attached to a support shaft in the cover is pressed in a direction of pressing against the rear end of the push button. It is characterized in that, at the other end of the hook member, a hook-like portion is provided at the other end of the hook member, the hook-like portion engaging with an engaging portion formed on the case body when the hook member rotates in the biasing direction.

According to a second aspect of the present invention, the interval between the inclined surface and the push button is such that the operation of lifting the inclined surface and the operation of pressing the push button can be performed simultaneously with the fingertip of one hand. Characterized by

According to the first aspect of the present invention, the inclined surface of the cover forms an acute angle with the surface of the cover.
When the fingertip is pressed against the inclined surface, a rotating force for opening the cover is generated. When the push button is pressed with a fingertip, the hook-like portion of the hook member pushed by the push button is disengaged from the engaging portion of the case main body, and the lock of the cover is released.

Therefore, if the operation of pressing the push button and the operation of pressing the fingertip on the inclined surface are performed simultaneously, the cover is opened.
A complicated device for lifting the cover as in the conventional example becomes unnecessary.

According to the second aspect of the present invention, the interval between the inclined surface and the push button is set such that the operation of lifting the inclined surface and the operation of pushing the push button can be performed simultaneously with the fingertip of one hand. The operation of unlocking the cover and opening the cover becomes extremely simple.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific example of an embodiment of a lock device for a hinged door cover according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, a hinge 25 fixed to one end of the upper surface of the case body 2 of the shield case to which the locking device for the hinged door cover according to the present invention is applied.
Then, one end of the cover 1 is attached with screws 11, and an inclined surface 1 a that forms an acute angle with the surface 1 b of the cover 1 is formed on the other end surface of the cover 1. The legs 41 are attached to the four corners of the outer surface of the bottom wall 4 of the case body 2.

The present invention is characterized in that a locking device for a hinged door cover is constituted by an inclined surface 1a described below and a lock mechanism 3 provided near the inclined surface 1a.

The cover 1 is provided with a circular opening 15.
As shown in FIG. 3, the lock device cover 36 inserted into the circular opening 15 has a flange 3 at the upper end of the outer peripheral surface of the cylindrical body 36b.
6a, a male screw is screwed on the outer peripheral surface excluding the flange portion 36a, and a bottom wall 36c is provided inside. After the lock device cover 36 is inserted into the circular opening 15 (FIG. 1), the lock device cover 36 is fixed to the cover 1 by a nut 35 screwed into a male screw on the outer peripheral surface.

The push button 31 inserted into the lock device cover 36 has a pressing surface 31a formed on the upper surface, and a pin portion 31b penetrating the bottom wall 36c of the lock device cover 36 at the lower end. An inclined surface 31 at the lower end of 31b
c is formed. Further, on the side surface of the push button 31, a stopper pin 38 for regulating the amount of protrusion of the push button 31 is provided. Furthermore, the bottom wall 36c of the lock device cover 36
A compression spring 34 is inserted between the push button 31 and the
The lock device cover 36 is urged upward.

A support shaft 37 is provided below the push button 31 so as to penetrate the lock device cover 36, and the support shaft 37 is inserted into a hole 32 d of the hook member 32.

The hook member 32 has a push button 3
A corresponding cam surface 32b abutting on one pin 31b is provided, and a hook 32a is formed at the lower end of the hook member 32.

The hook portion 32a is provided on the inner wall plate 2 of the case body 2.
When the cover 1 is inserted into the opening engaging portion 21 provided on the cover 2, it engages with the inner surface 22 a of the inner wall plate 22 to lock the cover 1 so that it cannot be opened.

An urging spring 33 wound around the support shaft 37
Is pressed against the lock device cover 36, and the urging spring 33 is pressed.
Is pressed against the hook member 32.

Accordingly, the hook member 32 is urged counterclockwise about the support shaft 37 so that the corresponding cam surface 32b abuts against the inclined surface 31c of the push button 31, and the hook-like portion 32a contacts the inner wall plate 22. It is biased in the direction of engagement.

The operation of the lock device configured as described above will be described with reference to FIGS.

FIG. 3 shows that the cover 1 is the upper surface 2 of the case body 2.
a, the hook 32a of the hook member 32 is engaged with the inner wall plate 22 of the case body, and the cover 1 is locked so as not to be opened.

In this state, as shown in FIG. 6 (a), the abdominal surface of the thumb is pressed against the inclined surface 1a of the cover 1, and the abdominal surface of the index finger presses the pressing surface 31a of the push button 31.
push.

By the operation of this finger, as shown in FIG.
The push button 31 is lowered and the cam surface 31c is moved to the hook member 3.
2, the hook member 32 rotates clockwise about the support shaft 37, the hook-like portion 32a of the hook member 32 is detached from the opening engaging portion 21, and the lock is released. As shown in FIG. 5, FIG. 5 and FIG.
The cover 1 is opened by the force of the thumb pressing the cover 1.

Here, since the push button 31 is located near the inclined surface 1a, the lock release and the cover 1 can be performed by a simple operation of sandwiching the pressed surface 31a of the push button 31 and the inclined surface 1a of the cover 1 with a fingertip. Can be performed simultaneously, and the force pressing the inclined surface 1a becomes the force for opening the cover 1 as it is, so that the lock release and the cover opening can be performed with one touch without providing a complicated cover lifting device as in the related art. Can be done easily.

[0040]

As described above, according to the first aspect of the present invention, the operation of unlocking the cover and opening the cover is easy, and the handle and the like do not protrude from the side of the cover. Since there is no need to provide a cover lifting device or the like as in the related art without restricting the shape, it is possible to provide a lock device for a door-type cover with low product cost.

According to the second aspect of the present invention, the interval between the inclined surface and the push button is set so that the lifting operation of the inclined surface and the pushing operation of the push button can be simultaneously performed with the fingertip of one hand. In addition, it is possible to provide a lock device for a door-type cover in which the operation of unlocking the cover and opening the cover is extremely simple.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a shield case provided with a lock device for a hinged door cover according to the present invention.

FIG. 2 is a perspective view of the shield case of FIG.

3 is a view showing a locked state of a cover of the shield case of FIG. 1, and is a view showing a cross section taken along line XX of FIG. 2;

FIG. 4 is a view showing an unlocked state of a cover of the shield case of FIG. 1, and is a view showing a cross section along XX of FIG. 2;

5 is a view showing a state when the cover of the shield case of FIG. 1 is started to be opened, and is a view showing a cross section along XX of FIG. 2;

FIGS. 6A and 6B are views for explaining the operation of the cover of the shield case in FIG. 1, wherein FIG. 6A is a perspective view for explaining a cover unlocking operation, and FIG.

FIG. 7 is a perspective view showing a conventional shield cover provided with a cover locking device.

FIG. 8 is a sectional view taken along line YY of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover 1a Inclined surface 1b Surface 2 Case main body 3 Lock mechanism 4 Bottom wall 11 Screw 12 Handle part 14 Screw 15 Circular opening 21 Opening engaging part 22 Internal plate 23 Pressure receiving member 24 Coil spring 25 Coil spring cover 31 Push button 31a Pressing Surface 31b Pin portion 31c Inclined surface 32 Hook member 32a Hook-shaped portion 32b Corresponding cam surface 33 Urging spring 34 Compression spring 35 Nut 36 Lock device cover 37 Support shaft 38 Stopper pin 41 Leg

Claims (2)

[Claims] 1. An inclined surface which forms an acute angle with respect to the surface of the cover is provided on the other end surface of the cover whose one end is pivotally attached to the upper surface of the case main body, and is protrudable and retractable on the surface of the cover in the vicinity of the inclined surface. A push button that is inserted into the cover and is urged in the direction in which the tip protrudes, and urges one end of a hook member pivotally attached to a support shaft in the cover in a direction of pressing against a rear end of the push button; A lock device for a hinged door cover, wherein a hook-shaped portion is provided at the other end of the hook member to engage with an engaging portion formed on the case main body when the hook member rotates in a biasing direction. . 2. An interval between the inclined surface and the push button,
2. The lock device for a hinged door cover according to claim 1, wherein an interval at which the lifting operation of the inclined surface and the pressing operation of the push button can be performed simultaneously with a fingertip of one hand.