Cam type locking device, packaging box and locking method of packaging box

Abstract

The invention relates to a cam type locking device, a packaging box and a locking method of the packaging box. The cam type locking device comprises a rocker arm 1, a cam plate 2, a rotating shaft assembly and a hasp 7, the cam plate 2 is fixedly installed on the side face of a sliding cover 10 of the packaging box, the rotating shaft assembly and the hasp 7 are both fixedly installed on a packaging box body 11, and the center point of the rocker arm 1 is rotationally connected with the rotating shaft assembly and can rotate around the rotating shaft assembly. When the box cover is closed, the sliding cover 10 slides towards the middle to be closed, the rocker arm 1 is rotated to be kept vertical, the cam plate 2 is pressed through the ball head 8 at the A end of the rocker arm, and the hasp 7 and the B end of the rocker arm are connected and locked. When the box cover is opened, the connection relation between the hasp 7 and the rocker arm B end is released, the rocker arm 1 is rotated in the opposite direction to keep horizontal, and the other hasp 7 is connected and locked with the rocker arm B end. According to the quick opening and locking device, the closing and locking time of the packaging box cover is greatly shortened, quick opening and locking of the box cover are achieved, and the loading and transporting efficiency of the packaging box is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of locking devices and packaging boxes, and in particular to a cam-type locking device, a packaging box and a locking method thereof. Background Art

[0002] There are many kinds of packaging boxes for large mechanical products, one of the more common ones is Figure 4 The slide cover type packaging box shown. The packaging box includes a slide cover 10 and a box body 11. The slide cover 10 can be slid to both sides to move away from each other, and the packaging box can be opened for hoisting. The slide cover 10 can be slid in the opposite direction to close the packaging box for transportation. At this time, the slide cover needs to be locked to prevent it from opening accidentally. The existing slide cover locking devices on the market cannot effectively limit and fix the flat cover, resulting in the box cover being unable to be locked, and these locking devices often become loose due to wear after being used for a period of time. Summary of the invention

[0003] One of the purposes of the present invention is to solve the above-mentioned problems existing in the prior art and to provide a cam type locking device, which includes a rocker arm 1, a cam plate 2, and a rotating shaft assembly. The middle part of the rocker arm 1 is connected to the rotating shaft assembly and can rotate around it in a plane. The cam plate 2 is located on the rotation path of the end of the rocker arm 1 and can be pressed by the rocker arm 1.

[0004] Furthermore, the rotation angle of the rocker arm 1 in the plane is 90°, corresponding to the vertical locking state and the horizontal unlocking state respectively.

[0005] Furthermore, the contact surface between the cam plate 2 and the end of the rocker arm 1A is an inclined surface, which can gradually press the cam plate 2 and the slide cover 10 connected thereto to prevent the slide cover 10 from moving.

[0006] Furthermore, the device also includes a ball head 8 and a screw, wherein the ball head 8 is fixedly connected to the end of the rocker arm 1A via the screw. The ball head 8 is used to press the cam plate 2, and the pressing amount of the ball head 8 can be adjusted by adjusting the length of the screw to prevent the locking effect from being deteriorated due to wear during long-term use.

[0007] Furthermore, the device also includes two groups of buckles 7, and the buckles 7 are both located on the rotation path of the rocker arm 1B end, that is, one of the buckles 7 is arranged opposite to the cam plate 2, and the connection line between the two buckles 7 and the shaft assembly is at a right angle.

[0008] Furthermore, a limiting long hole is provided at the end of the rocker arm 1B along its length direction, and any buckle 7 can be fixedly connected to the limiting long hole, thereby locking or unlocking the movement of the rocker arm 1.

[0009] Furthermore, the shaft assembly includes a base plate 3, a shaft 4, a left side plate 5, and a right side plate 6, wherein the left side plate 5 and the right side plate 6 are symmetrically fixed on the same side of the base plate 3, and one end of the shaft 4 is connected to the base plate 3 and the other end is connected to the middle of the rocker arm 1.

[0010] The second object of the present invention is to provide a sliding cover type packaging box equipped with the above-mentioned cam type locking device, wherein the cam plate 2 is fixed to the side of the sliding cover 10, and the inclined surface of the cam plate 2 faces outward; the rocker arm 1 is fixed to the side of the box body 11 through a rotating shaft assembly, and the buckle 7 is fixed to the side of the box body 11 and is located on the rotation path of the rocker arm 1.

[0011] The third object of the present invention is to provide a locking method for the above-mentioned sliding cover packaging box, comprising: closing the box cover: sliding the sliding cover 10 toward the middle to close it, rotating the rocker arm 1 to keep it vertical, using the ball head 8 at the rocker arm 1A end to press the cam plate 2, and connecting and locking the buckle 7 to the rocker arm 1B end; opening the box cover: releasing the connection between the buckle 7 and the rocker arm 1B end, rotating the rocker arm 1 in the opposite direction to keep it horizontal, and connecting and locking the other buckle 7 to the rocker arm 1B end.

[0012] Compared with existing similar products, the improvements of the present invention are mainly reflected in the following aspects: (1) The locking device has a simple structure, is easy to use, has a low cost, has a good locking effect, and is safe and reliable; (2) It has a long service life. By adjusting the ball head and the bolt, the influence of wear can be overcome, thereby reducing the cost of use; (3) It significantly reduces the closing and locking time of the packaging box lid, realizes the rapid opening and locking of the box lid, and improves the shipping efficiency of the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the back side of a cam-type locking device.

[0014] Figure 2 It is a schematic diagram of the locking state of the cam type locking device.

[0015] Figure 3 This is a schematic diagram of the unlocked state of the cam type locking device.

[0016] Figure 4 It is a schematic diagram of the structure of a sliding cover packaging box equipped with the above-mentioned cam type locking device.

[0017] Figure numerals: 1-rocker arm, 2-cam plate, 3-bottom plate, 4-rotating shaft, 5-left side plate, 6-right side plate, 7-buckle, 8-ball head, 9-limiting long hole, 10-sliding cover, 11-box body. DETAILED DESCRIPTION

[0018] In order to enable ordinary technicians in the field to fully understand the technical solutions and beneficial effects of the present invention, the following is a further detailed description in conjunction with specific embodiments and drawings.

[0019] like Figure 1-4 A cam-type locking device is shown, comprising a rocker arm 1, a cam plate 2, a shaft assembly and two buckles 7. The cam plate 2 is fixedly mounted on the side of a sliding cover 10 of a packaging box. The shaft assembly and the buckles 7 are both fixed on a packaging box body 11. The center point of the rocker arm 1 is rotatably connected to the shaft assembly and can rotate around it.

[0020] Specifically, the cam plate 2 and the buckle 7 are arranged on the rotation path of the two ends of the rocker arm 1, wherein the cam plate 2 is located at the top, and the two buckles 7 are located on the left and the bottom, respectively. A ball head 8 is connected to the A end of the rocker arm 1 by bolts, and the ball head 8 faces the side of the cam plate 2. As a matching, the side of the cam plate 2 that contacts the ball head is an inclined surface. A limited long hole 9 is set at the B end of the rocker arm 1. The shaft assembly includes a base plate 3, a shaft 4, a left side plate 5, and a right side plate 6. The two ends of the shaft 4 are fixedly connected to the connecting hole in the middle of the base plate 3 and the center hole of the rocker arm 1, respectively. The left side plate 5 and the right side plate 6 are fixed in parallel and staggered on the left and right sides of the bottom surface of the base plate 3, and the left side plate 5 and the right side plate 6 are welded to the box body 11.

[0021] The locking principle of the cam type locking device is as follows Figure 2 The rocker arm 1 is rotated to keep it vertical, the ball head 8 at the rocker arm 1A end presses the cam plate 2, and the buckle 7 at the rocker arm 1B end passes through the limiting long hole 9 to limit its rotation.

[0022] The unlocking principle of the cam type locking device is as follows Figure 3 Move the buckle 7 at the B end of the rocker arm 1 out of the limiting long hole 9, rotate the rocker arm 1 in the opposite direction to move its B end to the buckle 7 on the left side, and pass the buckle 7 through the limiting long hole 9 to limit its rotation.

[0023] By rotating the rocker arm 1, the contact and separation between the ball head 8 and the cam plate 8 are achieved, thereby realizing rapid limit locking and unlocking between the packaging box and the sliding cover, which has the advantages of high efficiency and convenience and saves a lot of time.

[0024] Considering that the cam plate 2 is squeezed by the ball head 8 for a long time, the stress at the contact part between the two is relatively large, which is prone to wear. When the wear exceeds a certain limit, the wear can be compensated by adjusting the bolts connected to the ball head.

Claims

1. A cam type locking device, characterized in that: The device comprises a rocker arm, a cam plate and a rotating shaft assembly. The middle part of the rocker arm is connected to the rotating shaft assembly and can rotate around it in a plane. The cam plate is located on the rotating path of the end of the rocker arm and can be pressed by the rocker arm.

2. The cam type locking device according to claim 1, characterized in that: The swing angle of the rocker arm is 90°.

3. The cam type locking device according to claim 1, characterized in that: The contact surface between the cam plate and the A end of the rocker arm is an inclined surface, and the cam plate is gradually pressed by the inclined surface.

4. The cam type locking device according to claim 3, characterized in that: The device also includes a ball head and a screw rod, wherein the ball head is fixedly connected to the end 1A of the rocker arm via the screw rod.

5. The cam type locking device according to claim 1, characterized in that: The device also includes two groups of buckles, both of which are located on the rotation path of the rocker arm B end, and the connection line between the two buckles and the rotating shaft assembly is at a right angle.

6. The cam type locking device according to claim 5, characterized in that: A limiting long hole matching the buckle is arranged at the B end of the rocker arm along its length direction.

7. The cam type locking device according to claim 1, characterized in that: The shaft assembly includes a bottom plate, a shaft, a left side plate, and a right side plate, wherein the left side plate and the right side plate are symmetrically fixed on the same side of the bottom plate, and one end of the shaft is connected to the bottom plate and the other end is connected to the middle of the rocker arm.

8. A sliding cover packaging box, characterized in that: The sliding cover packaging box is installed with a cam-type locking device as described in any one of claims 1 to 7, wherein the cam plate is fixed to the side of the sliding cover with its inclined surface facing outward, the rocker arm is fixed to the side of the box body through a rotating shaft assembly, and the buckle is fixed to the side of the box body and is located on the rotation path of the rocker arm.

9. The method for using the sliding cover packaging box according to claim 8, characterized in that The method includes: Close the box cover: slide the cover toward the middle to close it, turn the rocker arm to keep it vertical, use the ball head at the A end of the rocker arm to press the cam plate, connect the buckle with the B end of the rocker arm and lock it; Open the box cover: release the connection between the buckle and the B end of the rocker arm, turn the rocker arm in the opposite direction to keep it horizontal, connect the other buckle to the B end of the rocker arm and lock it.

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