JP3937199B2 - Lid lock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid locking device such as an article storage box.
[0002]
[Prior art]
Conventionally, as a lid locking device for an article storage box or the like, for example, the applicant of the present invention forms a lid from a synthetic resin, integrally forms an annular elastic portion that can be elastically deformed at the time of injection molding, and provides elasticity to the lock member. There has been proposed a lid locking device that presses the portion and constantly urges the lock member to the lock position (see Japanese Utility Model Laid-Open No. 5-16660).
[0003]
[Problems to be solved by the invention]
However, the lid locking device described above has a structure in which the elastic portion is annular, and the lock member is urged by a shape restoring force that is stored when the shape is entirely distorted. For this reason, when trying to improve the operability by reducing the sliding amount of the lock member during the operation of the lid locking device, it has been difficult to ensure a strong biasing force on the elastic portion. In addition, there is a problem that the biasing force of the lock member is likely to vary due to a molding error of the elastic portion.
[0004]
The present invention has been made in view of such conventional problems, and even when the sliding amount of the lock member is reduced, it is easy to ensure a strong biasing force against the lock member, and the biasing force varies. An object of the present invention is to provide a lid locking device that is less likely to cause the occurrence of a problem.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention of claim 1, it is provided in the peripheral part of the lid that closes the opening of the box main body, and is in the open position and the engaged state in a non-engaged state with respect to the box main body. a locking member is slidable in a certain closed position, the lid lock apparatus having a biasing means for constantly biasing the lock member in said closed position, said biasing means Ri plate Banedea, the leaf spring Both ends are fixed and curved in the closing direction of the locking member, and a thought point is set on the leaf spring in which the spring force rapidly decreases during the deformation process accompanying the sliding movement of the locking member in the opening direction. It is supposed to be.
[0006]
In such a configuration, even when the leaf spring reduces the sliding amount of the lock member, it is easy to ensure a strong biasing force against the lock member, and the biasing force is less likely to vary. Moreover, when the thought point is exceeded, the operating force in the opening direction of the lock member is rapidly reduced.
[0007]
In the invention of claim 2, the leaf spring is metallic.
[0008]
In this configuration, the leaf spring is rich in durability.
[0011]
According to a third aspect of the present invention, a pair of holding portions for holding both end portions of the leaf spring is provided, the pair of holding portions open in a direction facing each other, and are arranged in a square shape. .
[0012]
In this configuration, when the leaf spring is attached, the lock member is bent in the closing direction.
[0013]
According to a fourth aspect of the present invention, in each of the pair of holding portions, a fixing portion that fixes the position of the locking member in the opening and closing direction at one end of the leaf spring, and the other end side from the one end that exists in the leaf spring And a restricting portion for determining a movement limit in the opening direction of the deformation restricting point located in the position.
[0014]
In this configuration, the thought point is set by the fixed portion and the restricting portion. Thereby, compared with the case where the thought point is set only by the leaf spring, even if the leaf spring is only slightly deformed in the opening direction, the biasing force in the closing direction applied to the lock member is increased.
[0015]
In the invention of claim 5, the restricting portion is a projection.
[0016]
In such a configuration, it is possible to easily prevent the plate spring from being in a state where it cannot be restored from the deformed state in which the lock member is fixed in the opening direction, while having a thought point.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 is an external perspective view of an article storage box showing an embodiment of the present invention. The article storage box includes a box body 1 and a lid 2 that closes an upper end opening of the box body 1. A pair of lid locking devices 3 are attached to the periphery of the lid 2 at the center of the opposite side, and the lid locking device 3 can slide on the lid 2 in the opening direction B and the closing direction B. The locking member 4 is provided.
[0019]
FIG. 2 is a perspective view of a main part of the lid 2 in the lid locking device 3. An attachment recess 6 in which the lock member 4 is slidably accommodated is formed at the center portion of the opposite side in the longitudinal direction of the top plate 5 of the lid 2. Two guide holes 8 penetrating the side walls are formed at predetermined intervals below the side walls 7 of the mounting recess 6. Holding portions 9 and 9 are provided in the vicinity of the inner guide hole 8 on the mounting recess 6, respectively. The holding portions 9 and 9 hold both ends of a metal leaf spring 10 as urging means for constantly urging the lock member 4 to the closed position.
[0020]
FIG. 3 is a plan view of the mounting recess 6 shown in FIG. In the mounting recess 6, holding portions 9 and 9 are provided so as to be inclined in a letter C. The holding portions 9 and 9 have a U-shape that opens to face each other. A substantially triangular accommodation space E in which one end of the leaf spring 10 is accommodated is formed at the closing side end of each holding portion 9, and a fixing portion 11 that fixes the position of the lock member 4 in the opening / closing direction at the one end. Is provided. A protrusion-like restricting portion 12 that determines the movement limit in the opening direction of the deformation restricting point 13 located on the other end side from one end of the leaf spring 10 is provided at the opening side end portion on the opening direction side of the holding portion 9. ing. The leaf spring 10 is curved in the closing direction B of the lock member 4. The lock member 4 can be deformed in the opening direction (a) and can always be restored to its shape. The leaf spring 10 is set with a thought point where the spring force rapidly decreases in the process of deforming the locking member 4 in the opening direction. Such a thought point is set by the fixing portion 11 and the restricting portion 12 so as to come immediately before the locking member 4 reaches the open position.
[0021]
FIG. 4 is a bottom view of the lock member 4 described above. Two small protrusions 14 are formed on the lower portions of both outer surfaces of the lock member 4 at a predetermined interval corresponding to the guide holes 8 provided in the lock member mounting recess 6. The small projecting piece 14 is shorter than the guide hole 8 and is slidably guided by the guide hole 8 when fitted in the guide hole 8. In addition, a U-shaped protruding portion 15 is formed at the inner central portion of the inner end surface of the lock member 4. On the other hand, a locking hook 16 that engages with the box body 1 is suspended from the outer end portion of the lock member 4. And the nail | claw 17 which protruded inside is formed in the lower end both sides of this latching hook 16. As shown in FIG.
[0022]
In order to attach the lock member 4 to the lid body 2, the small projecting piece 14 of the lock member 4 is fitted into the guide hole 8 of the attachment recess 6. Thereby, although not shown, the protruding portion 15 of the lock member 4 is in contact with the central portion of the leaf spring 10.
[0023]
FIG. 5 is a cross-sectional view taken along the line AA in FIG. In FIG. 5, the claw 17 formed on the locking hook 16 of the lock member 4 engages with the horizontal flange portion 18 of the box body 1, and the lock member 4 is moved to the inner side through the protruding portion 15 by the spring force of the leaf spring 10. The lock member 4 is fixed in the closed position.
[0024]
In such a configuration, when the lid is opened, the protruding portion 15 of the locking member 4 is the spring of the leaf spring 10 while the small protruding piece 14 of the locking member 4 is slid outward in the guide hole 8 of the mounting recess 6 with a finger. The leaf spring 10 is deformed so as to bend outward against the force, and the lock member 4 is slid outward to the open position. Thereby, the engagement state of the locking hook 16 of the lock member 4 and the horizontal flange portion 18 of the box body 1 is released. Thereafter, when the finger is released from the lock member 4, the lock member 4 automatically returns to the closed position by the spring force of the leaf spring 10.
[0025]
When the lid is closed, the lid 2 is placed on the box body 1 with the finger sliding the lock member 4 outward against the spring force of the leaf spring 10 as in the case of opening the lid. Thereafter, when the finger is released from the lock member 4, the lock member 4 automatically slides back to the closed position, and the claw 17 of the locking hook 16 engages with the horizontal flange portion 18.
[0026]
In the present embodiment, a metal leaf spring 10 is used as a biasing means that constantly biases the lock member 4 to the closed position. For this reason, since it is easy to ensure the strong urging | biasing force with respect to the lock member 4, the sliding amount of the lock member 4 can be decreased and the cover locking device which improves operativity can be provided. Further, since the leaf spring 10 is less likely to vary in the urging force against the lock member 4, it is possible to ensure a constant quality of the lid locking device. Further, since the leaf spring 10 is rich in durability, it is possible to secure a constant biasing force against the lock member 4 over a long period of time. Further, since a thought point is set by the fixing portion 11 and the restriction portion 12 in the deformation process associated with the movement of the lock member 4 in the opening direction A in the leaf spring 10, when the thought point is exceeded, the lock member 4 The operating force in the opening direction a decreases rapidly. Therefore, when the lid is opened as described above, the lock member 4 can obtain a good operational feeling. Further, as compared with the case where the thought point is set only by the leaf spring 10, even if the leaf spring 10 is only slightly deformed in the opening direction A, the biasing force applied to the lock member 4 in the closing direction B becomes large. Therefore, the shape restoring force from the deformed state of the leaf spring 10 is increased, so that the lid 2 can be firmly fixed to the box body 1. For the same reason, since the lock member 4 automatically returns from the open position to the closed position quickly, the operational feeling of the lock member 4 is further improved. Further, when the lock member 4 is slid to the open position, the sliding amount of the lock member 4 can be reduced, so that the operability of the lock member 4 can be improved. Further, since the restricting portion 12 is a protrusion, it is possible to easily prevent the leaf spring 10 from being in a state in which the shape return from the deformed state fixed in the opening direction A of the lock member 4 is impossible while having a thought point. . Further, the holding portions 9 and 9 are opened to face each other, and arranged in a square shape so that the leaf spring 10 is curved in the closing direction B when attached, so that the leaf spring 10 is curved in advance. There is no need to mold. Therefore, since the manufacturing cost of the leaf spring 10 can be suppressed, the cost of the lid locking device can be reduced.
[0027]
In this embodiment, a metal spring is used as the leaf spring. However, a leaf spring of another material may be used as long as the required spring force can be obtained. Further, the holding portions 9 and 9 are provided on the lid body 2 and the leaf spring 10 is attached to the lid body 2 side. However, even if the leaf spring 10 is provided on the lock member 4 side, the same effect can be obtained. Further, although the restricting portion 12 is a protrusion, a sufficient effect can be obtained even without the protrusion.
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, the leaf spring can secure a strong biasing force against the lock member even when the slide amount of the lock member is reduced. Therefore, the slide amount of the lock member is reduced. Thus, it is possible to provide a lid locking device that improves operability. Further, since the leaf springs are less likely to vary in the urging force against the lock member, it is possible to ensure a constant quality of the lid locking device. In addition, since the operating force in the opening direction of the lock member suddenly decreases when the thought point is exceeded, a good operational feeling can be obtained when the lock member is slid in the opening direction.
[0029]
In the invention of claim 2, the leaf spring is made highly durable. Therefore, it is possible to secure a biasing force against the lock member that is constant over a long period of time.
[0031]
In the invention of claim 3 , when the leaf spring is attached, the lock member is bent in the closing direction. Therefore, since it is not necessary to shape the leaf spring in advance, the manufacturing cost of the leaf spring can be suppressed. Therefore, the cost of the lid locking device can be reduced.
[0032]
Further, in the invention of claim 4 , the thought point is set by the fixing portion and the restricting portion. As a result, compared with the case where the thought point is set only by the leaf spring, the biasing force in the closing direction applied to the lock member is increased even if the leaf spring is only slightly deformed in the opening direction. Therefore, since the shape restoring force from the deformed state of the leaf spring is increased, the lid can be firmly fixed to the box body. For the same reason, since the lock member automatically returns from the open position to the closed position quickly, the operational feeling of the lock member is further improved. Further, since the sliding amount of the lock member can be reduced when the lock member is slid to the open position, the operability of the lock member can be improved.
[0033]
In the invention of claim 5 , it is possible to easily prevent the leaf spring from being in a state in which it is impossible to return the shape from the deformed state fixed in the opening direction of the lock member while having a thought point.
[0034]
[Brief description of the drawings]
FIG. 1 is an external perspective view of an article storage box showing an embodiment of the present invention.
FIG. 2 is a perspective view of a main part of a lid body in the lid body locking device.
3 is a plan view of the mounting recess 6 shown in FIG. 2. FIG.
FIG. 4 is a bottom view of a lock member in the lid locking device.
FIG. 5 is a cross-sectional view taken along the line AA of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Box main body 2 Cover body 3 Cover body locking device 4 Lock member 9 Holding part 10 Leaf spring 11 Fixing part 12 Restriction part 13 Deformation restriction point

Claims (5)

A locking member provided at a peripheral portion of the lid that closes the opening of the box body, and slidable between an open position in a non-engaged state with respect to the box body and a closed position in an engaged state; in the lid lock apparatus having a biasing means for normally urging said closed position, said biasing means Ri plate Banedea, curved leaf spring is fixed at both ends in the closing direction of the lock member In addition, a lid locking device is provided in which a thought point is set in the leaf spring in which the spring force rapidly decreases during a deformation process associated with the sliding movement of the locking member in the opening direction .   The lid locking device according to claim 1, wherein the leaf spring is metallic. A pair of holding portions are provided for fixing the opposite ends of the leaf spring, with an opening in a direction in which the pair of holding portions face each other, according to claim 1 or 2, wherein the disposed-shaped Ha Lid lock device. In each of the pair of holding portions, a fixing portion that fixes the position of the lock member in the opening and closing direction at one end of the leaf spring, and an opening of a deformation restriction point that is located on the other end side from the one end that exists in the leaf spring. The lid locking device according to claim 3, further comprising a restriction portion that determines a movement limit in the direction. The lid locking device according to claim 4 , wherein the restricting portion is a protrusion.

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