Self-locking structure and bed plate-slidable transfer bed

Abstract

This utility model relates to a self-locking structure and a transfer bed with a sliding bed board. The self-locking structure includes a base, a locking plate, and an unlocking part. The unlocking part is movably connected to the base, and the locking plate can slide relative to the base. The locking plate has a lock hole, and the unlocking part has a locking member that can extend into the lock hole. The base has a transmission structure that converts the movement of the unlocking part into the sliding of the locking member along the axis of the lock hole. The movement of the unlocking part includes forward movement and reverse movement. Forward movement of the unlocking part can drive the locking member to be pulled out of the lock hole; reverse movement of the unlocking part can drive the locking member to move towards the bottom of the lock hole. The self-locking structure of this utility model can automatically reset and lock the locking plate on the base without manual fixing. The transfer bed of this utility model can automatically lock the bed board on the bed body during the process of pushing the bed board to reset, avoiding the problem of medical staff forgetting to lock the bed board, causing the patient to slide and fall off the transfer bed.

Description

Technical Field

[0001] This utility model relates to the technical field of transfer beds, and more specifically, to a transfer bed with a self-locking structure and a sliding bed board. Background Technology

[0002] Transport beds can move patients to different departments for treatment, and the bed board on the transport bed can slide to transport patients to different equipment for treatment, solving the problem of patients who are difficult to move and cannot get out of bed. Currently, most transport beds rely on medical staff to manually lock the bed board after it slides back into place. To prevent medical staff from forgetting to lock the bed board, there are clear reminder signs affixed to the transport bed.

[0003] However, relying on human initiative to lock the bed board poses risks in practical applications. When medical staff ignore reminders or forget to lock the bed board to the transport bed, the bed board may slide on the transport bed during the process of moving the transport bed, causing the patient to fall off the transport bed and resulting in injury. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies where, if medical staff neglect to remind or forget to lock the bed board on the transport bed, the sliding of the bed board on the transport bed during its movement may cause the patient to slide off the transport bed. This invention provides a transport bed with a self-locking structure and a sliding bed board. The self-locking structure in this solution can automatically lock after sliding and resetting. When applied to a transport bed, it can lock the bed board without relying on the subjective initiative of medical staff, thus avoiding the problem of the patient falling off the transport bed due to the unlocked bed board.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A self-locking structure is provided, including a base, a locking plate, and an unlocking part, wherein the unlocking part is movably connected to the base, and the locking plate is slidable relative to the base; The locking plate is provided with a lock hole, the unlocking part is provided with a locking member that can extend into the lock hole, and the base is provided with a transmission structure that can convert the movement of the unlocking part into the sliding of the locking member along the axis of the lock hole; The movement of the unlocking part includes forward movement and reverse movement. The forward movement of the unlocking part can drive the locking member to be pulled out of the keyhole; the reverse movement of the unlocking part can drive the locking member to move towards the bottom of the keyhole.

[0006] The unlocking part and the base can be connected in a sliding or rotating manner. When the unlocking part is slidably connected to the base, the sliding direction of the unlocking part can be along the axis of the lock hole or along the sliding direction of the base. When the unlocking part slides along the axis of the lock hole, it can be a pin, shaft, or rod. When the unlocking part slides along the sliding direction of the base, it can be a slider, and the transmission structure can be an inclined plane for the slider to slide on. When the unlocking part and the base are rotatably connected, the transmission structure can be a crank-slider, ball screw, inclined surface, or other structures. Among the three types of movable connections between the unlocking part and the base, the structure with a rotatable connection occupies the least space and is most suitable for use in the self-locking structure of this solution.

[0007] When the self-locking mechanism needs to be opened, the operator drives the unlocking part to move forward. This forward movement of the unlocking part, through a transmission structure, causes the locking element to move upward until it is pulled out of the keyhole. After the locking element is pulled out, the operator pushes the locking plate, which can slide relative to the base. When the locking plate slides until the keyhole and the locking element are misaligned, the operator releases the unlocking part. The unlocking part will then move in the opposite direction due to its own weight or other external driving structure. This reverse movement of the unlocking part, through a transmission structure, causes the locking element to move downward. As the locking element moves downward, it abuts against the upper surface of the locking plate. After the locking plate slides back to its original position, the locking element that abutted against the upper surface of the locking plate will re-insert into the keyhole cavity, thus re-fixing the locking plate on the base.

[0008] The sliding reset self-locking structure of this design automatically locks the locking plate onto the base when it slides back to its original position, eliminating the need for manual fixing. This sliding reset self-locking structure can be widely used in the quick-release installation and sliding reset of sliding bed panels in transport beds, CT and MR hospital beds.

[0009] Furthermore, the unlocking part is rotatably connected to the base, the unlocking part is provided with an unlocking boss, the transmission structure includes a first inclined surface, the bottom of the unlocking boss abuts against the first inclined surface, when the unlocking part rotates in the forward direction, it can drive the unlocking boss to move towards the top of the first inclined surface; when the unlocking part rotates in the reverse direction, it can drive the unlocking boss to move towards the bottom of the first inclined surface.

[0010] The transmission structure includes a first inclined surface with a height difference between the top and bottom of the first inclined surface. When the unlocking part rotates, the unlocking boss can slide on the first inclined surface. The height difference of the first inclined surface enables the unlocking part to move up and down, thereby driving the locking part to move up and down, completing the conversion from the rotation of the unlocking part to the sliding of the locking part.

[0011] Furthermore, the transmission structure also includes a first plane for the bottom of the unlocking boss to rest on, the first plane being connected to the top of the first inclined surface; A driving member is slidably connected to the base, the bottom of which can abut against the locking plate. The locking plate is provided with a sliding groove, and the end of the sliding groove is provided with a second inclined surface. The top of the second inclined surface is inclined away from the midpoint of the sliding groove. The bottom of the driving member can slide along the second inclined surface into the sliding groove and then slide along the sliding groove. The unlocking protrusion is provided with a third inclined surface, the inclination direction of the third inclined surface is the same as the inclination direction of the first inclined surface, and the top of the driving member can move upward to abut against the third inclined surface and push the unlocking protrusion from the first plane to the first inclined surface.

[0012] During the sliding process, when the projection of the locking element in the vertical direction is located on the locking plate, the bottom surface of the locking element abuts against the top surface of the locking plate.

[0013] When the unlocking part rotates until the unlocking boss moves along the first inclined plane to the first plane, the unlocking boss can stay on the first plane, preventing the unlocking part from pulling the locking part down, thus completing the unlocking of the locking plate on the base. When the locking plate is not sliding, the bottom of the driving member is located in the middle of the slide groove. When the locking plate begins to slide, with the slide groove as a reference, the bottom of the driving member first slides towards the edge of the slide groove until the bottom of the driving member slides to the second inclined plane at the edge of the slide groove. As the locking plate continues to slide, the driving member slides along the second inclined plane until it slides to the upper surface of the locking plate. During the process of the driving member sliding along the second inclined plane, the driving member moves away from the bottom surface of the slide groove in its axial direction, that is, the driving member moves upward. During the upward movement, the top of the driving member first abuts against the third inclined plane on the unlocking boss. After the driving member continues to move upward, the top of the driving member applies force to the third inclined plane to push the unlocking boss, causing the unlocking boss to be pushed from the first plane to the first inclined plane. When the unlocking boss is pushed from the first plane to the first inclined plane, it moves downward along the first inclined plane under its own gravity. At this time, the unlocking part reverses and drives the locking part to move downward until the locking part abuts against the upper surface of the locking plate.

[0014] In order to enable the third inclined surface to move forward smoothly after the driving component applies a thrust to it, the third inclined surface can be an inclined surface with its top inner side inclined towards the locking component.

[0015] The design of the slide and the first plane allows the operator to rotate the unlocking part until the unlocking boss is on the first plane before pushing the locking plate to slide. This eliminates the need for the operator to hold the unlocking part while sliding the locking plate, making it easier for the operator to operate.

[0016] Furthermore, the base is provided with a first mounting hole and a second mounting hole, the locking member passes through the first mounting hole and is rotatably connected to the first mounting hole, and the locking member can slide along the axis of the first mounting hole; The drive element is located within the second mounting hole and can slide along the axis of the second mounting hole.

[0017] The first and second mounting holes can further limit the sliding direction of the locking and driving components.

[0018] Furthermore, both the first and third inclined surfaces are spiral-shaped. The axis of the first inclined surface coincides with the axis of the first mounting hole, and the axis of the third inclined surface coincides with the axis of the locking member. Since the unlocking part and the base are rotatably connected, when the unlocking part rotates, the movement trajectory of the unlocking boss on the first inclined surface is spiral-shaped. Setting the first inclined surface as spiral-shaped can better match the movement trajectory of the unlocking boss. Similarly, setting the third inclined surface as spiral-shaped also better matches the movement trajectory of the unlocking part when it rotates.

[0019] Furthermore, the base is also provided with a fourth inclined surface, which is symmetrically arranged with the first inclined surface about the axis of the first mounting hole as the center. The unlocking part is provided with a guide boss, the bottom of which abuts against the fourth inclined surface. When the unlocking part rotates, the guide boss moves along the fourth inclined surface, and the unlocking boss moves along the first inclined surface. The fourth inclined surface and the guide boss can prevent the unlocking part from tilting when rotating, providing more stable support for the unlocking part. The fourth inclined surface is also spiral-shaped, and the bottom edge of the guide boss is chamfered, which makes it easier for the guide boss to slide along the fourth inclined surface.

[0020] Furthermore, a limiting hole is provided on the side wall of the second mounting hole, connecting the inner cavity of the second mounting hole to the outside. The driving component is provided with a guide groove, the axis of which is parallel to the axis of the driving component. A positioning wire is provided in the limiting hole, one end of which can extend into the guide groove and slide in connection with it. The positioning wire is threadedly connected to the limiting hole. When the driving component slides up and down in the second mounting hole, the guide groove slides relative to the positioning wire. The guide groove and positioning wire limit the displacement dimension of the driving component's up and down sliding.

[0021] Furthermore, both ends of the driving member and the bottom surface of the locking member are arc-shaped. More specifically, both ends of the driving member and the bottom surface of the locking member are hemispherical. Setting the bottom of the driving member as a hemispherical surface makes it easier for the driving member to slide along the first inclined plane; setting the top of the driving member as a hemispherical surface allows the top of the driving member to smoothly push the third inclined plane forward; when the bottom surface of the locking member is hemispherical, it allows the locking member to smoothly slide into the lock hole.

[0022] Furthermore, an elastic element is fitted onto the locking member, with one end connected to the locking member and the other end abutting against the base. The bottom of the locking member has a boss, and the inner cavity of the base has a receiving hole for accommodating the elastic element. The receiving hole is coaxial with the first mounting hole. One end of the elastic element is fixedly mounted on the boss, and the other end abuts against the bottom of the receiving hole. The elastic element allows the locking member to smoothly extend into the inner cavity of the lock hole after aligning with it.

[0023] Furthermore, the locking plate is provided with fifth inclined surfaces on both sides, and the distance from the bottom of the fifth inclined surface to the center of the locking plate is greater than the distance from the top of the fifth inclined surface to the center of the locking plate. When the locking plate slides until the vertical projection of the locking member is no longer on the locking plate, the locking member can slide along the fifth inclined surface to separate from the locking plate; when the locking plate slides in the opposite direction until the vertical projection of the locking member is again on the locking plate, the locking member can slide along the fifth inclined surface to the upper surface of the locking plate. The fifth inclined surface first serves as a guide, allowing the locking member to slide smoothly onto the locking plate, and at the same time, it can shorten the length of the locking plate, making the sliding distance of the locking plate greater than the length of the locking plate, thus making the structure of the locking plate more compact.

[0024] Furthermore, it also includes a housing, on which the base is fixedly installed. The housing is provided with unlocking and locking marks. The housing prevents external debris from entering the base, thus providing protection. The unlocking and locking marks on the housing also facilitate the operator in determining the direction of rotation of the unlocking mechanism.

[0025] This utility model also provides a transfer bed with a sliding bed board, including a bed body and a bed board. The bed board is slidably connected to the bed body. The bed board can be fixed to the bed body by the above-mentioned self-locking structure. The base is fixed to the bed body, and the locking plate is fixed to the bed board.

[0026] The transfer bed of this invention can automatically lock the bed board onto the bed body during the process of pushing the bed board back to its original position. This eliminates the need for medical staff to actively lock the bed board onto the bed body, thus avoiding the problem of medical staff forgetting to lock the bed board, causing the bed board to move and the patient to slide off the transfer bed during the process of pushing the transfer bed, thereby improving the safety of the transfer bed during use.

[0027] Compared with the prior art, the beneficial effects of this utility model are: The self-locking structure of this invention can automatically lock and fix the locking plate on the base when the locking plate slides and resets on the base, without the need to manually fix the locking plate again.

[0028] The transfer bed of this invention can automatically lock the bed board onto the bed body during the process of pushing the bed board back to its original position. This eliminates the need for medical staff to actively lock the bed board onto the bed body, thus avoiding the problem of medical staff forgetting to lock the bed board, causing the bed board to move and the patient to slide off the transfer bed during the process of pushing the transfer bed, thereby improving the safety of the transfer bed during use. Attached Figure Description

[0029] Figure 1 A schematic diagram of a self-locking structure; Figure 2 This is a schematic diagram of the internal structure of a self-locking structure. Figure 3 A schematic diagram showing the result of the self-locking state of a self-locking structure excluding the base; Figure 4 This is a schematic diagram of the working state of an unlocking boss of a self-locking structure when it moves to the first plane. Figure 5 A schematic diagram of the working state of a self-locking structure when the driving component pushes the unlocking boss back to the first inclined plane; Figure 6 A schematic diagram of a base with a self-locking structure; Figure 7 A schematic diagram of a self-locking drive component; Figure 8 A schematic diagram of a locking plate with a self-locking structure; Figure 9 A schematic diagram of the unlocking part of a self-locking structure; Figure 10 This is a schematic diagram of the unlocking part of a self-locking structure from another angle. Figure 11 A schematic diagram of a shell with a self-locking structure; Figure 12 This is a schematic diagram of a second embodiment of a self-locking structure; Figure 13 An exploded view of a second embodiment of a self-locking structure; Figure 14 This is a schematic diagram of a transfer bed with a sliding bed board; Figure 15 This is an exploded view of a transfer bed with a sliding bed board.

[0030] In the attached diagram: 100, base; 200, locking plate; 300, unlocking part; 400, positioning screw; 500, elastic element; 600, housing; 700, bed body; 800, bed board; 110, first inclined surface; 120, first flat surface; 130, driving element; 131, guide groove; 140, first mounting hole; 150, second mounting hole; 151, limiting hole; 160, fourth inclined surface; 210, lock hole; 221, second inclined surface; 220, sliding groove; 230, fifth inclined surface; 310, locking element; 320, unlocking boss; 321, third inclined surface; 330, guide boss; 610, unlocking mark; 620, locking mark. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Example 1 This embodiment is a first embodiment of a self-locking structure, such as... Figure 1 and Figure 2 As shown, it includes a base 100, a locking plate 200 and an unlocking part 300. The unlocking part 300 is rotatably connected to the base 100, and the locking plate 200 can slide relative to the base 100. The locking plate 200 is provided with a lock hole 210, the unlocking part 300 is provided with a locking member 310 that can extend into the lock hole 210, and the base 100 is provided with a transmission structure that can convert the rotation of the unlocking part 300 into the sliding of the locking member 310 along the axial direction of the lock hole 210. The unlocking part 300 can rotate in both forward and reverse directions. When the unlocking part 300 rotates in the forward direction, it can pull the locking member 310 out of the lock hole 210. When the unlocking part 300 rotates in the reverse direction, it can move the locking member 310 toward the bottom of the lock hole 210.

[0034] Specifically, the transmission structure can be a crank-slider, ball screw, gear, or other similar structures.

[0035] The working principle or process of this embodiment is as follows: When it is necessary to open the self-locking structure, the operator rotates the unlocking part 300 forward. The forward rotation of the unlocking part 300 drives the locking part 310 to move upward through the transmission structure until the locking part 310 is pulled out from the lock hole 210. After the locking part 310 is pulled out from the lock hole 210, the operator pushes the locking plate 200, which can slide relative to the base 100. When the locking plate 200 slides until the lock hole 210 is misaligned with the locking member 310, the operator releases the unlocking part 300. The unlocking part 300 will rotate in the opposite direction by its own weight or other externally driven structure. The rotating unlocking part 300 drives the locking member 310 to move downward through the transmission structure. At this time, the locking member 310 will abut against the upper surface of the locking plate 200 when it moves downward. When the locking plate 200 slides back to its original position, the locking member 310, which abuts against the upper surface of the locking plate 200, will re-insert into the inner cavity of the lock hole 210, thus completing the re-fixation of the locking plate 200 on the base 100.

[0036] The beneficial effects of this embodiment are as follows: The self-locking structure of this embodiment can automatically lock and fix the locking plate 200 on the base 100 when the locking plate 200 slides and resets on the base 100, without the need for manual fixing of the locking plate 200. The self-locking structure of this embodiment can be widely used in the quick-release installation and sliding reset of the bed boards of slidable transfer beds, CT and MR hospital beds.

[0037] Example 2 This embodiment is a second embodiment of a self-locking structure, such as... Figures 1-13 As shown, this embodiment further defines the self-locking structure based on Embodiment 1.

[0038] Specifically, the unlocking part 300 is provided with an unlocking boss 320, and the transmission structure includes a first inclined surface 110. The bottom of the unlocking boss 320 abuts against the first inclined surface 110. When the unlocking part 300 rotates in the forward direction, it can drive the unlocking boss 320 to move towards the top of the first inclined surface 110. When the unlocking part 300 rotates in the reverse direction, it can drive the unlocking boss 320 to move towards the bottom of the first inclined surface 110.

[0039] Specifically, the transmission structure also includes a first plane 120 for the bottom of the unlocking boss 320 to rest on, and the first plane 120 is connected to the top of the first inclined surface 110; A driving member 130 is slidably connected to the base 100, and its bottom can abut against the locking plate 200. The locking plate 200 is provided with a sliding groove 220, and the end of the sliding groove 220 is provided with a second inclined surface 221. The top of the second inclined surface 221 is inclined away from the midpoint of the sliding groove 220. The bottom of the driving member 130 can slide along the second inclined surface 221 into the sliding groove 220 and then slide along the sliding groove 220. The unlocking boss 320 is provided with a third inclined surface 321. The inclination direction of the third inclined surface 321 is the same as that of the first inclined surface 110. The top of the driving member 130 can move upward to abut against the third inclined surface 321 and push the unlocking boss 320 from the first plane 120 to the first inclined surface 110.

[0040] Specifically, the base 100 is provided with a first mounting hole 140 and a second mounting hole 150. The locking member 310 passes through the first mounting hole 140 and is rotatably connected to the first mounting hole 140. The locking member 310 can slide along the axis of the first mounting hole 140. The drive member 130 is located within the second mounting hole 150 and can slide along the axis of the second mounting hole 150.

[0041] Specifically, both the first inclined surface 110 and the third inclined surface 321 are spiral-shaped. The axis of the first inclined surface 110 coincides with the axis of the first mounting hole 140, and the axis of the third inclined surface 321 coincides with the axis of the locking member 310.

[0042] Specifically, the base 100 is also provided with a fourth inclined surface 160. The fourth inclined surface 160 and the first inclined surface 110 are arranged symmetrically with the axis of the first mounting hole 140 as the center. The unlocking part 300 is provided with a guide boss 330, and the bottom of the guide boss 330 abuts against the fourth inclined surface 160.

[0043] Specifically, the side wall of the second mounting hole 150 is provided with a limiting hole 151 that connects the inner cavity of the second mounting hole 150 to the outside. The drive member 130 is provided with a guide groove 131, the axis of the guide groove 131 is parallel to the axis of the drive member 130, and a positioning screw 400 is threaded into the limiting hole 151. One end of the positioning screw 400 extends into the guide groove 131 and is slidably connected to the guide groove 131.

[0044] Specifically, both ends of the driving component 130 and the bottom surface of the locking component 310 are hemispherical.

[0045] Specifically, an elastic element 500 is sleeved on the locking member 310. One end of the elastic element 500 is connected to the locking member 310, and the other end abuts against the base 100. The bottom of the locking member 310 is provided with a boss, and the inner cavity of the base 100 is provided with a receiving hole that can accommodate the elastic element 500. The receiving hole is coaxial with the first mounting hole 140. One end of the elastic element 500 is fixedly mounted on the boss, and the other end abuts against the bottom of the receiving hole.

[0046] Specifically, the locking plate 200 is provided with a fifth inclined surface 230 on both sides. The distance from the bottom of the fifth inclined surface 230 to the center of the locking plate 200 is greater than the distance from the top of the fifth inclined surface 230 to the center of the locking plate 200.

[0047] Specifically, it also includes a housing 600, a base 100 fixedly installed on the housing 600, and an unlocking mark 610 and a locking mark 620 on the housing 600.

[0048] The working principle or process of this embodiment is as follows: When the operator rotates the unlocking part 300 forward, the unlocking part 300 rotates and drives the unlocking boss 320 to move up the first inclined surface 110, which in turn drives the unlocking part 300 to move upward until the unlocking part 300 rotates until the unlocking boss 320 moves onto the first plane 120. At this time, the locking part 310 is pulled out from the lock hole 210 under the drive of the unlocking part 300.

[0049] When the driving member 130 slides along the second inclined surface 221 from the groove 220 to the upper surface of the locking plate 200, the driving member 130 moves upward in the vertical direction. During the upward movement, the driving member 130 abuts against the third inclined surface 321 of the unlocking boss 320. Since the unlocking part 300 has already moved to the first plane 120 at this time, the driving member 130 abuts against the bottom of the third inclined surface 321. As the driving member 130 continues to move upward, it continues to move upward and presses the third inclined surface 321. Under the pressure of the driving member 130, the third inclined surface 321 will push the unlocking boss 320 forward. That is, the driving member 130 will push the third inclined surface 321 to move in the opposite direction until the unlocking boss 320 returns from the first plane 120 to the first inclined surface 110. At this time, the driving member 130 continues to move upward and can drive the unlocking boss 320 to slide downward on the two inclined surfaces by pressing the third inclined surface 321. Under the pressure of the driving member 130, the deformation force of the elastic member 500, and the gravity of the unlocking part 300 itself, the unlocking boss 320 slides downward along the second inclined surface 221, thereby driving the locking member 310 to move downward.

[0050] When the locking plate 200 slides to the point where the lock hole 210 and the locking member 310 are misaligned, the locking member 310 slides downwards and abuts against the top surface of the locking plate 200. As the locking plate 200 continues to slide, the locking member 310 slides along the fifth inclined surface 230 until it separates from the locking plate 200. When the locking plate 200 slides back to its original position, the locking member 310 slides along the fifth inclined surface 230 to the top surface of the locking plate 200 until the lock hole 210 and the locking member 310 are realigned. The locking member 310 then re-inserts into the inner cavity of the lock hole 210, completing the locking of the locking plate 200.

[0051] The beneficial effects of this embodiment are as follows: The sliding groove 220 and the first plane 120 allow the operator to rotate the unlocking part 300 until the unlocking boss 320 is positioned on the first plane 120 before pushing the locking plate 200 to slide. This eliminates the need for the operator to hold the unlocking part 300 while sliding the locking plate 200, making operation easier. The first mounting hole 140 and the second mounting hole 150 further limit the sliding direction of the locking member 310 and the driving member 130. Setting the first inclined surface 110 in a spiral shape better matches the movement trajectory of the unlocking boss 320. Similarly, setting the third inclined surface 321 in a spiral shape also better matches the movement trajectory of the unlocking part 300 during rotation. The fourth inclined surface 160 and the guide boss 330 prevent the unlocking part 300 from tilting due to a misaligned center of gravity during rotation, providing more stable support. The guide groove 131 and the positioning screw 400 limit the vertical displacement of the driving member 130. Setting the bottom of the driving member 130 as a hemispherical surface facilitates its sliding along the first inclined surface 110; setting the top of the driving member 130 as a hemispherical surface allows it to smoothly push the third inclined surface 321 forward; when the bottom surface of the locking member 310 is hemispherical, it allows it to smoothly slide into the lock hole 210. The elastic member 500 allows the locking member 310 to smoothly extend into the inner cavity of the lock hole 210 after aligning with it. The fifth inclined surface 230 not only serves as a guide but also shortens the length of the locking plate 200, making the sliding distance of the locking plate 200 greater than its length, thus making the structure of the locking plate 200 more compact. The housing 600 is designed to prevent external debris from entering the base 100, thus providing protection. The housing 600 is also equipped with an unlocking mark 610 and a locking mark 620 to help operators determine the direction of rotation of the unlocking part 300.

[0052] Example 3 This embodiment is an example of a transfer bed with a sliding bed board, such as... Figures 14-15 As shown, the bed includes a bed frame 700 and a bed board 800. The bed board 800 is slidably connected to the bed frame 700. The bed board 800 can be fixed to the bed frame 700 by a self-locking structure as described in Embodiment 1 or 2. The base 100 is fixed to the bed frame 700, and the locking plate 200 is fixed to the bed board 800.

[0053] The beneficial effects of this embodiment are as follows: In this embodiment, the transfer bed can automatically lock the bed board 800 onto the bed body 700 during the process of pushing the bed board 800 to reset. This eliminates the need for medical staff to actively lock the bed board 800 onto the bed body 700, thus avoiding the problem of medical staff forgetting to lock the bed board 800, causing the bed board 800 to move and the patient to slide off the transfer bed during the process of pushing the transfer bed, thereby improving the safety of the transfer bed during use.

[0054] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A self-locking structure, characterized by, It includes a base (100), a locking plate (200), and an unlocking part (300), wherein the unlocking part (300) is movably connected to the base (100), and the locking plate (200) is slidable relative to the base (100); The locking plate (200) is provided with a lock hole (210), the unlocking part (300) is provided with a locking member (310) that can extend into the lock hole (210), and the base (100) is provided with a transmission structure that can convert the movement of the unlocking part (300) into the sliding of the locking member (310) along the axial direction of the lock hole (210); The movement of the unlocking part (300) includes forward movement and reverse movement. The forward movement of the unlocking part (300) can drive the locking member (310) to be pulled out from the lock hole (210); the reverse movement of the unlocking part (300) can drive the locking member (310) to move towards the bottom of the lock hole (210).

2. A self-locking structure according to claim 1, wherein The unlocking part (300) is rotatably connected to the base (100). The unlocking part (300) is provided with an unlocking boss (320). The transmission structure includes a first inclined surface (110). The bottom of the unlocking boss (320) abuts against the first inclined surface (110). When the unlocking part (300) rotates in the forward direction, it can drive the unlocking boss (320) to move towards the top of the first inclined surface (110). When the unlocking part (300) rotates in the reverse direction, it can drive the unlocking boss (320) to move towards the bottom of the first inclined surface (110).

3. A self-locking structure according to claim 2, wherein The transmission structure also includes a first plane (120) for the bottom of the unlocking boss (320) to rest, the first plane (120) being connected to the top of the first inclined surface (110); A driving member (130) with its bottom abutting against the locking plate (200) is slidably connected to the base (100). The locking plate (200) is provided with a groove (220). The end of the groove (220) is provided with a second inclined surface (221). The top of the second inclined surface (221) is inclined away from the midpoint of the groove (220). The bottom of the driving member (130) can slide along the second inclined surface (221) into the groove (220) and then slide along the groove (220). The unlocking boss (320) is provided with a third inclined surface (321), the inclination direction of the third inclined surface (321) is the same as the inclination direction of the first inclined surface (110), the top of the driving member (130) can move upward to abut against the third inclined surface (321) and push the unlocking boss (320) from the first plane (120) to the first inclined surface (110).

4. A self-locking structure according to claim 3, wherein The base (100) is provided with a first mounting hole (140) and a second mounting hole (150). The locking member (310) passes through the first mounting hole (140) and is rotatably connected to the first mounting hole (140). The locking member (310) can slide along the axis of the first mounting hole (140). The drive member (130) is located within the second mounting hole (150) and the drive member (130) is slidable along the axis of the second mounting hole (150).

5. A self-locking structure according to claim 4, wherein Both the first inclined surface (110) and the third inclined surface (321) are spiral-shaped. The axis of the first inclined surface (110) coincides with the axis of the first mounting hole (140); the axis of the third inclined surface (321) coincides with the axis of the locking member (310).

6. A self-locking structure according to claim 4, wherein The base (100) is also provided with a fourth inclined surface (160). The fourth inclined surface (160) and the first inclined surface (110) are arranged symmetrically with the axis of the first mounting hole (140) as the center. The unlocking part (300) is provided with a guide boss (330). The bottom surface of the guide boss (330) abuts against the fourth inclined surface (160).

7. A self-locking structure according to claim 4, wherein The side wall of the second mounting hole (150) is provided with a limiting hole (151) that connects the inner cavity of the second mounting hole (150) and the outside. The driving member (130) is provided with a guide groove (131), the axis of the guide groove (131) is parallel to the axis of the driving member (130), and a positioning wire (400) is provided in the limiting hole (151). One end of the positioning wire (400) can extend into the guide groove (131) and slide in connection with the guide groove (131).

8. The self-locking structure according to claim 3, wherein Both ends of the driving member (130) and the bottom surface of the locking member (310) are arc-shaped.

9. A self-locking structure according to claim 1, characterized in that, An elastic element (500) is sleeved on the locking member (310), one end of the elastic element (500) is connected to the locking member (310), and the other end abuts against the base (100).

10. A self-locking structure according to claim 3, characterized in that, The locking plate (200) is further provided with a fifth inclined surface (230) on both sides. The distance from the bottom of the fifth inclined surface (230) to the center of the locking plate (200) is greater than the distance from the top of the fifth inclined surface (230) to the center of the locking plate (200).

11. A self-locking structure according to claim 1, characterized in that, It also includes a housing (600), the base (100) is fixedly installed on the housing (600), and the housing (600) is provided with an unlock mark (610) and a lock mark (620).

12. A transfer bed with a sliding bed board, characterized in that, The device includes a bed frame (700) and a bed board (800), wherein the bed board (800) is slidably connected to the bed frame (700), the bed board (800) is fixed to the bed frame (700) by a self-locking structure as described in any one of claims 1-11, the base (100) is fixed to the bed frame (700), and the locking plate (200) is fixed to the bed board (800).

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