Lock catch and sealing box using same

Abstract

The utility model belongs to the field of hasp fasteners, and particularly provides a lock catch and a sealing box using the lock catch. The lock catch comprises a hasp base, a hasp plate capable of swinging is installed on the hasp base, a lock hook capable of swinging is installed on the hasp plate, the swinging axis of the hasp plate and the swinging axis of the lock hook are parallel, a set eccentric distance exists between the swinging axis of the hasp plate and the swinging axis of the lock hook, the swinging axis of the hasp plate is located on the back side of the lock hook, and a torsional spring shaft is arranged on one of the lock hook and the hasp plate. A torsional spring is sleeved on the torsional spring shaft, the axis of the torsional spring shaft is parallel to the swing axis of the lock hook, at least one of supporting arms of the torsional spring abuts against the hasp plate, and at least one of the supporting arms of the torsional spring abuts against the lock hook. The sealing box comprises the lock catch. According to the lock catch, the torsional spring located between the hasp plate and the lock hook is additionally arranged, when locking is needed, the hasp plate can be swung towards the side close to the lock hook, the lock hook is pushed through the torsional spring to move towards the side close to a locked device, the lock hook is hung on the locked device, and operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of snap fasteners, and in particular relates to a lock and a sealing box using the lock. Background Technology

[0002] To improve the sealing performance of the sealed box, after the lid and body are fastened together, a latch is generally used to lock them together. For example, the utility model patent with authorization announcement number CN203268592U discloses a sealing connection structure and a sealed box using the sealing connection structure. The sealing connection structure includes a latch structure (i.e., a latch) that can press the seal between the lid and the body. The latch structure includes a base that can be fixed to the body. A latch plate is hinged to the base, and a hook (i.e., a locking hook) is hinged to the latch plate. The hook specifically includes a hook body and a screw plate, which are threaded together. There is an eccentricity between the hinge axis of the hook and the hinge axis of the latch plate. The latch plate is located on the back of the hook. When sealing is required, the hook body can be placed on the outer edge of the lid, and then the buckle plate can be rotated. The rotation of the buckle plate can cause the hook body to press down and engage with the outer edge, pressing down the seal between the lid and the box. Due to the eccentricity between the axis of the buckle plate and the hook, when the buckle plate is rotated to the dead point position, the lid and the box can be sealed tightly to ensure airtightness.

[0003] The aforementioned latch structure (i.e., locking mechanism) involves placing the hook (i.e., locking hook) onto the locked device (lid) during closure. For larger sealed boxes, to ensure sealing, a large number of latch structures are often required at intervals. Locking all the latches in this case takes a considerable amount of time and is inconvenient. Furthermore, with the trend towards automation, using robots to automatically lock the latch structure is the future direction, but the aforementioned latch structure's locking steps are relatively complex and not convenient for robot operation. Utility Model Content

[0004] The purpose of this invention is to provide a locking mechanism to solve the technical problem of inconvenient operation when locking in existing technologies. Another purpose of this invention is to provide a sealed box using the aforementioned locking mechanism to solve the same technical problem.

[0005] To achieve the above objectives, the technical solution for the latch provided by this utility model is as follows:

[0006] A latch includes a latch seat with a swingable latch plate mounted on the latch seat and a swingable hook mounted on the latch plate. The swing axis of the latch plate and the swing axis of the hook are parallel and have a set eccentricity. The swing axis of the latch plate is located on the back side of the hook. One of the hook and the latch plate is provided with a torsion spring shaft. A torsion spring is sleeved on the torsion spring shaft, and the axis of the torsion spring shaft is parallel to the swing axis of the hook. Among the support arms of the torsion spring, at least one support arm abuts against the latch plate and at least one support arm abuts against the hook.

[0007] As a further improvement, the torsion spring shaft is provided on the fastener plate, and the two ends of the fastener plate in the width direction are provided with inwardly folded side flanges. The torsion spring shaft is provided on both side flanges. The torsion spring is a double torsion spring, and the two spring bodies of the double torsion spring are respectively sleeved on the two torsion spring shafts.

[0008] As a further improvement, the torsion spring shaft is made of a screw threaded onto the side flange.

[0009] As a further improvement, support plates are fixed on the inner walls of the two flanges, and the two ends of the swing shaft of the locking hook are inserted into the support plates respectively, and rotate with the support plates.

[0010] As a further improvement, the latch plate is provided with a force-bending section that folds away from the hook, so that force can be applied to the latch plate to make it swing.

[0011] As a further improvement, the stressed bending section is provided with a through hole extending along the thickness direction of the snap fastener plate for connecting the end effector of the robotic arm.

[0012] As a further improvement, the locking hook includes a hook body and a screw plate, which are threaded together.

[0013] As a further improvement, a weight-reducing groove is provided at the center of the width direction of the fastener plate.

[0014] This utility model is an improved invention, and its beneficial effects are as follows: Compared with the prior art, the latch in this utility model adds a torsion spring located between the latch plate and the hook. When locking is required, the latch plate can be swung towards the side closer to the hook. Since the torsion spring also has a certain rigidity, when the latch plate swings, it can also push the hook towards the side closer to the locked device, so that the hook can be hooked on the locked device. After the hook is hooked in place, since there is a set eccentricity between the swing axis of the latch plate and the swing axis of the hook, and the swing axis of the latch plate is located on the back side of the hook, by continuing to control the swing of the latch plate, the hook can be driven to press against the locked device and thus lock the locked device. During this process, the torsion spring can be compressed, which does not affect the normal locking of the hook.

[0015] As can be seen from the above analysis, the latch in this utility model can automatically achieve "hooking" and locking by simply rotating the latch plate during the locking process, while the unlocking process is the opposite, which is convenient to operate.

[0016] To achieve the above objectives, the technical solution for the sealed box provided by this utility model is as follows:

[0017] A sealed box includes a box body, a box lid, and a latch for locking the box body and the box lid. The latch includes a latch seat, a hinged latch plate mounted on the latch seat, and a hinged latch hook mounted on the latch plate. The hinge axis of the latch plate and the hinge axis of the latch hook are parallel and have a set eccentricity. The hinge axis of the latch plate is located on the back side of the latch hook. One of the latch hook and the latch plate is provided with a torsion spring shaft. A torsion spring is sleeved on the torsion spring shaft, and the axis of the torsion spring shaft is parallel to the hinge axis of the latch hook. Among the support arms of the torsion spring, at least one support arm abuts against the latch plate, and at least one support arm abuts against the latch hook.

[0018] As a further improvement, the torsion spring shaft is provided on the fastener plate, and the two ends of the fastener plate in the width direction are provided with inwardly folded side flanges. The torsion spring shaft is provided on both side flanges. The torsion spring is a double torsion spring, and the two spring bodies of the double torsion spring are respectively sleeved on the two torsion spring shafts.

[0019] As a further improvement, the torsion spring shaft is made of a screw threaded onto the side flange.

[0020] As a further improvement, support plates are fixed on the inner walls of the two flanges, and the two ends of the swing shaft of the locking hook are inserted into the support plates respectively, and rotate with the support plates.

[0021] As a further improvement, the latch plate is provided with a force-bending section that folds away from the hook, so that force can be applied to the latch plate to make it swing.

[0022] As a further improvement, the stressed bending section is provided with a through hole extending along the thickness direction of the snap fastener plate for connecting the end effector of the robotic arm.

[0023] As a further improvement, the locking hook includes a hook body and a screw plate, which are threaded together.

[0024] As a further improvement, a weight-reducing groove is provided at the center of the width direction of the fastener plate.

[0025] This utility model is an improved invention, and its beneficial effects are as follows: Compared with the prior art, the lock used in the sealing box of this utility model adds a torsion spring located between the latch plate and the lock hook. When locking is required, the latch plate can be swung towards the side closer to the lock hook. Since the torsion spring also has a certain rigidity, when the latch plate swings, it can also push the lock hook towards the side closer to the locked device, so that the lock hook can be hooked on the box lid. After the lock hook is hooked in place, since there is a set eccentricity between the swing axis of the latch plate and the swing axis of the lock hook, and the swing axis of the latch plate is located on the back side of the lock hook, by continuing to control the swing of the latch plate, the lock hook can be driven to press against the box lid and thus lock the box lid. During this process, the torsion spring can be compressed, which does not affect the normal locking of the lock hook.

[0026] As can be seen from the above analysis, the latch in this utility model can automatically achieve "hooking" and locking by simply rotating the latch plate during the locking process, while the unlocking process is the opposite, which is convenient to operate. Attached Figure Description

[0027] Figure 1 This is a perspective view of the locking embodiment of the present utility model;

[0028] Figure 2 This is a cross-sectional view of the latch embodiment in the unlocked state of this utility model;

[0029] Figure 3 This is a cross-sectional view of the locking embodiment of this utility model in the locked state.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Hook and loop fastener; 2. Hook and loop plate; 3. Hook and loop hook; 4. Torsion spring; 5. Torsion spring shaft; 6. Hook and loop shaft; 7. Hook and loop plate shaft; 8. Support plate; 201. Side flange; 202. Force-bearing bending part; 203. Through hole; 301. Hook body; 302. Threaded plate; 401. Support arm. Detailed Implementation

[0032] To facilitate locking the latch, the basic technical concept of this utility model is to add a force-transmitting component between the latch plate and the locking hook. This component allows the locking hook to engage with the locked device while the latch plate is flipped, eliminating the need to separately hook the locking hook onto the locked device, thus making operation more convenient. The fundamental premise of this force-transmitting component is that it should not interfere with the normal rotation of the latch plate to its dead center. Therefore, this utility model uses a torsion spring as the aforementioned force-transmitting component. When the latch plate is flipped, the torsion spring twists and deforms accordingly.

[0033] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0034] Specific embodiments of the lock provided by this utility model:

[0035] like Figures 1-3 As shown, in a basic embodiment, the latch generally includes a latch seat 1, which is used to fix to the locked device, such as a sealed box, specifically by screws or rivets. A swingable latch plate 2 is mounted on the latch seat 1, which can be flipped and swung by external force. A swingable locking hook 3 is mounted on the latch plate 2. In use, when the locking hook 3 swings towards the locked device, it can hook onto the locked device; when it swings away from the locked device, it can detach from the locked device.

[0036] like Figures 1-3 As shown, the swing axis of the hook 3 (i.e., the axis of the hook shaft 6) is parallel to the swing axis of the latch plate 2 (i.e., the axis of the latch plate shaft 7), with a set eccentricity. Simultaneously, the swing axis of the latch is located on the back side of the hook 3; the back side refers to the side of the hook 3 that is away from the locked device during use. When the hook 3 is hooked onto the locked device, it... Figure 2 and Figure 3 For example, by continuing to flip the latch plate 2, the locking hook 3 can be pressed down, so that the locked device is reliably locked. When the latch plate 2 swings to the dead point position, the locking hook 3 can be kept in the locked position, that is, self-locking is achieved. The specific eccentricity is set according to the actual situation.

[0037] Unlike existing technologies, a torsion spring 4 is also provided between the latch plate 2 and the locking hook 3, such as... Figure 1 As shown, the torsion spring 4 can be installed on the latch plate 2. Of course, if space permits, the torsion spring 4 can also be installed on the hook 3. Specifically, the latch plate 2 is provided with a torsion spring shaft 5, and the torsion spring 4 is sleeved on the torsion spring shaft 5. Furthermore, the axis of the torsion spring shaft 5 is parallel to the swing axis of the hook 3. Regarding the torsion spring 4, those skilled in the art will understand that it includes a helical spring body and support arms 401 (or torsion arms) located at both ends of the spring body. The figure exemplarily shows a preferred case where the torsion spring 4 is a double torsion spring. Correspondingly, one support arm 401 of the torsion spring 4 abuts against the hook 3, and the other two support arms 401 abut against the latch plate 2.

[0038] When locked, such as Figure 2 As shown, in the initial state, the latch plate 2 is in a naturally downward swinging position. When the latch plate 2 is flipped upwards, the torsion spring 4, which also has a certain rigidity, transmits the torque of the latch plate 2, thereby pushing the locking hook 3 towards the side closer to the locked device, i.e., the left side in the figure. This allows the locking hook 3 to hook onto the locked device, eliminating the need for a separate hooking process, making the operation more convenient and easier to automate. After the locking hook 3 is hooked onto the locked device, continuing to flip and swing the latch plate 2 allows the torsion spring 4 to twist and store energy, enabling the latch plate 2 to swing normally to the locking position.

[0039] In the case of the double torsion spring shown in the figure, the two spring bodies can be respectively fitted onto the two torsion spring shafts 5 during installation. Specifically, the two ends of the latch plate 2 in the width direction are provided with inwardly folded side flanges 201, and each of the two side flanges 201 is provided with a torsion spring shaft 5. The two spring bodies of the torsion spring 4 are respectively fitted onto the torsion spring shafts 5 on the two side flanges 201. Preferably, the torsion spring shaft 5 can be constituted by a screw threaded onto the side flange 201, which is more convenient for setting the torsion spring shaft 5. Of course, in other embodiments, it is not ruled out that the columnar torsion spring shaft 5 is welded to the side flange 201.

[0040] In addition, to reduce the weight of the latch plate 2, in some preferred embodiments, a weight-reducing groove is provided at the center of the width direction of the latch plate 2 without affecting the normal installation of the torsion spring 4.

[0041] It should be noted that in other embodiments, the torsion spring 4 can also be a common single torsion spring, that is, a torsion spring 4 with only one spring body and the two ends of the spring body being support arms 401. In this case, the two support arms 401 abut against the buckle plate 2 and the locking hook 3 respectively.

[0042] In implementation, the support arm 401 can be fixed (e.g., welded) to the locking hook 3 and the latch plate 2 respectively, or as follows: Figure 1 As shown, no additional fixing is required for the support arm 401. As long as the torsion spring 4 can transmit force and be torn when the buckle plate 2 is flipped, it is sufficient, and it has been tested and found to be usable.

[0043] Based on the above analysis, those skilled in the art will understand that in other embodiments, the torsion spring 4 can also be mounted on the locking hook 3, for example in... Figure 1 The back side of the lock hook 3 shown is provided with a flange and a torsion spring shaft 5 is installed.

[0044] To improve the reliability of the swing of the locking hook 3, in a preferred embodiment, such as Figure 1 As shown, support plates 8 are fixed (and weldable) on the inner walls of the two side flanges 201. The two ends of the swing shaft of the locking hook 3, i.e., the locking hook shaft 6, are respectively inserted into the support plates 8 and rotate in cooperation with the support plates 8. Compared with other embodiments where the two ends of the locking hook shaft 6 are inserted into the side flanges 201 instead of setting support plates 8, setting support plates 8 is equivalent to increasing the support area of ​​the locking hook shaft 6, making the locking hook shaft 6 more stable and less likely to come out.

[0045] For the hinge shaft 7 of the latch plate 2, as a relatively simple setting method, two bolts can be set to pass through the two side flanges 201 and the latch seat 1 respectively. That is, the bolt is equivalent to the latch plate shaft 7. To prevent the bolt from coming out, the nut can be screwed on the threaded section of the bolt.

[0046] In some preferred embodiments, for ease of operation of the flip-up latch plate 2, such as... Figures 1-3 As shown, the latch plate 2 is provided with a force-bending part 202 that folds (bends) away from the hook 3. The force-bending part 202 serves as the direct force-bearing part, making it convenient for workers to apply force to make the latch plate 2 swing.

[0047] Furthermore, based on the provision of a stress-bearing bending section 202, such as Figures 1-3 As shown, the stressed bending portion 202 is provided with a through hole 203 extending along the thickness direction of the latch plate 2. Considering that automation is an irreversible trend, the through hole 203 can be used to connect the end effector of a robotic arm, so that the automated robot can operate the latch plate 2 to rotate.

[0048] Furthermore, to make the locking hook 3 suitable for different locking devices, a locking hook 3 length-adjustable setting method is provided here, specifically, as follows: Figure 1 As shown, the locking hook 3 includes a hook body 301 and a screw plate 302, which are threaded together. The hook body 301 is mainly used to hook the locked device. In practice, the extension length of the hook body 301 can be adjusted by rotating the hook body 301 relative to the screw plate 302.

[0049] Specific embodiments of the sealed box in this utility model:

[0050] The sealed box includes a box body and a box lid, and also includes a latch that locks the box body and the box lid. The latch has the same structure as the latch embodiment described above, and will not be described in detail here.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A latch, comprising a latch base, a swingable latch plate mounted on the latch base, a swingable hook mounted on the latch plate, the swing axis of the latch plate and the swing axis of the hook being parallel and having a predetermined eccentricity, the swing axis of the latch plate being located on the back side of the hook, characterized in that, One of the lock hook and the clasp plate is provided with a torsion spring shaft, a torsion spring is sleeved on the torsion spring shaft, an axis of the torsion spring shaft is parallel to an oscillation axis of the lock hook, at least one supporting arm of the torsion spring abuts against the clasp plate, and at least one supporting arm of the torsion spring abuts against the lock hook.

2. The lock catch of claim 1 wherein, The torsion spring shaft is arranged on the clasp plate, both ends of the clasp plate in the width direction are provided with inwardly folded side flaps, the torsion spring shaft is arranged on each of the two side flaps, and the torsion spring is a double torsion spring, two spring bodies of the double torsion spring are respectively sleeved on the two torsion spring shafts.

3. The hasp of claim 2 wherein, The torsion spring shaft is composed of a screw which is screwed on the side flap.

4. The hasp of claim 1 wherein, Both ends of the oscillation shaft of the lock hook are respectively inserted into the supporting plates and rotationally cooperated with the supporting plates.

5. The hasp according to any one of claims 1-4, characterized in that A stress bending part is folded to one side away from the lock hook on the clasp plate, so as to facilitate the application of force to the clasp plate to drive the clasp plate to oscillate.

6. The lock catch of claim 5 wherein, The stress bending part is provided with a through hole penetrating in the thickness direction of the clasp plate, so as to be connected with an execution end of a mechanical arm.

7. The hasp of any one of claims 1-4, wherein, The lock hook comprises a hook body and a screw plate which are threadedly connected.

8. The hasp of claim 2 or 3, wherein, A weight-reducing groove is arranged at a central position of the clasp plate in the width direction.

9. A sealed case comprising a case body, a case cover, and a lock catch for locking the case body and the case cover, characterized in that, The lock catch is any one of claims 1-8. The lock catch is any one of claims 1-8.

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