Lifting self-locking trundle mechanism, base comprising trundle and physiotherapy couch

Abstract

The invention relates to the technical field of medical diagnosis and treatment bed equipment, in particular to a lifting self-locking trundle mechanism which is arranged below a frame body, the frame body can ascend and descend relative to the trundle mechanism and makes contact with the ground when the frame body is not lifted, the trundle mechanism comprises a trundle and a lifting locking block, the trundle is connected with the frame body through a connecting shaft, and the lifting locking block is connected with the trundle. The lifting locking block can rotate relative to the connecting shaft, in the rotating process of the lifting locking block, the frame body can be lifted to be separated from the ground, a first supporting face is arranged on the lifting locking block, and the first supporting face is used for supporting the frame body after the frame body is lifted; in the process that the lifting locking block lifts the frame body, the end, making contact with the frame body firstly, of the first supporting face rotates from one side of the rotating center line to the other side of the rotating center line in the rotating direction of the lifting locking block, so that the lifting locking block can maintain the current state after the frame body is lifted. The caster mechanism can achieve lifting of the physiotherapy couch, operation is convenient and fast, and the efficiency of medical work can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical treatment bed equipment, in particular to a lifting self-locking caster mechanism, a base containing the caster and a physiotherapy bed. BACKGROUND

[0002] In the field of medical treatment bed equipment, bed body mobility is a basic and essential function. A common way is to use mechanical structure to lift the bed body to adapt to different medical operation needs. Specifically, when the bed body needs to be moved, the bed body is lifted by the lifting mechanism, at which time the bed body caster is in contact with the ground, facilitating the medical staff to push the bed body to the designated position. When the bed body does not need to be moved, the bed body is lowered by the lifting mechanism, at which time the bed body leg is in contact with the ground, realizing the stable locking of the bed body and ensuring the safety and accuracy of the medical operation. However, the existing lifting mechanism is often complex in design, which not only increases the manufacturing cost, but also leads to high maintenance cost in the later stage. SUMMARY

[0003] The present application provides a lifting self-locking caster mechanism, a base containing the caster and a physiotherapy bed to solve the problem that the mechanical structure is often complex in design when the bed body is lifted by using mechanical structure in the prior art. The caster mechanism in the present application can realize the lifting of the physiotherapy bed and is convenient to operate, which can improve the efficiency of medical work.

[0004] The technical scheme of the present application is: a lifting self-locking caster mechanism, the caster mechanism is arranged below a frame body, the frame body can be lifted relative to the caster mechanism and is in contact with the ground when the frame body is not lifted, the caster mechanism comprises a caster and a lifting locking block, the caster is connected with the frame body through a connecting shaft, the lifting locking block can rotate relative to the connecting shaft, and the rotation center line of the lifting locking block is perpendicular to the axis of the connecting shaft, so that the lifting locking block does not affect the caster when rotating around the rotation center line, the lifting locking block can lift the frame body to be separated from the ground during rotation, the lifting locking block has a supporting surface one, and the supporting surface one is used to support the frame body after the frame body is lifted. During the lifting of the frame body, one end of the supporting surface one which first contacts with the frame body rotates from one side of the rotation center line to the other side along the rotation direction of the lifting locking block, so that the lifting locking block can maintain the current state after the frame body is lifted, thereby ensuring that the frame body is always lifted by the lifting locking block, so as to realize the lifting self-locking of the frame body.

[0005] Adopting the above scheme, the frame body can be lifted to be separated from the ground by rotating the lifting locking block, and through the arrangement of the supporting surface one, after the frame body is lifted, the frame body can apply a force to the lifting locking block, so that the lifting locking block can maintain the current state, thereby maintaining the lifting state of the frame body, that is, ensuring that the frame body is always separated from the ground, so that the frame body can be quickly moved by the casters; when the frame body is not needed to be moved, the frame body can be lowered to be in contact with the ground by reversely rotating the lifting locking block.

[0006] On the basis of the above scheme, the application can also be improved as follows: Further, after the frame body is lifted, in the cross section perpendicular to the rotation center line, the distance from the end of the supporting surface one first contacting with the frame body to the straight line intersecting with the rotation center line and perpendicular to the supporting surface one is 3-7mm.

[0007] Further, the lifting locking block also has a transition surface, the transition surface is smoothly transitioned as a whole, and in the process of lifting the frame body, the transition surface is first contacted with the frame body compared to the supporting surface one, and supports the frame body in the process of lifting the frame body by the lifting locking block, and the smooth degree in the lifting process of the frame body is ensured by the smoothly transitioned transition surface.

[0008] Further, the lifting locking block also has a supporting surface two, the supporting surface two is used to support the frame body when the frame body is not lifted, and the transition surface is located between the supporting surface one and the supporting surface two, so that when the frame body is not lifted, the frame body is supported by the ground and the supporting surface two at the same time, so that rotating the lifting locking block can be contacted with the frame body by the supporting surface two and the transition surface, thereby performing the lifting process of the frame body, and further ensuring the smooth degree in the lifting process of the frame body.

[0009] A base comprising the caster mechanism with the lifting self-locking function, the base also comprises a frame body, the four corners of the base are provided with the caster mechanism and a guide mechanism, the guide mechanism is used to guide the base to ascend and descend along the length direction of the connecting shaft, and the lifting locking blocks of the caster mechanisms at the four corners of the base simultaneously act through a connecting rod mechanism, so as to ensure the stability in the lifting process of the base.

[0010] Further, the connecting shaft extends into the inside of the base, the guide mechanism comprises a guide groove, a limiting hole and a limiting piece, the limiting hole is arranged on the connecting shaft and transversely penetrates the connecting shaft, the guide groove is arranged on the base and corresponds to the position of the limiting hole, the length direction of the guide groove is consistent with the length direction of the connecting shaft, and the limiting piece penetrates the guide groove and the limiting hole.

[0011] Further, the connecting rod and the transmission rod are rotatably connected through a connecting lug, one end of the connecting lug is fixedly connected with the connecting rod, and the other end is rotatably connected with the transmission rod.

[0012] Further, the connecting rod and the transmission rod are rotatably connected through a connecting lug, one end of the connecting lug is fixedly connected with the connecting rod, and the other end is rotatably connected with the transmission rod.

[0013] Further, the lifting locking block is fixedly provided with a pedal, and the pedal can drive the lifting locking block to rotate.

[0014] A physiotherapy bed comprising the above-mentioned base further comprises a bed body, the bed body is arranged on the base, and the casters are universal wheels.

[0015] Through the above technical solution, the beneficial effects of the present application are: 1. In the present application, the frame body can be lifted to be separated from the ground by rotating the lifting locking block, and the setting of the supporting surface one enables the frame body to apply a force to maintain its state to the lifting locking block after the frame body is lifted, so that the lifting locking block can maintain the current state, thereby maintaining the lifting state of the frame body, that is, ensuring that the frame body is always separated from the ground, so that the frame body can be quickly moved through the casters; when the frame body does not need to be moved, the frame body can be lowered to contact the ground by reversely rotating the lifting locking block.

[0016] 2. In the present application, the connecting rod is rotatably connected with the connecting shaft on the left end and the right end of the base, the lifting locking block is fixedly arranged on the connecting rod, and the two connecting rods are drivingly connected through the transmission rod, so that the lifting locking blocks of the four caster mechanisms at the bottom of the base can act simultaneously, thereby ensuring the stability during lifting of the base. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is one of the use schematic diagrams of the caster mechanism in the present application (the frame body is not lifted); Figure 2 is the use schematic diagram two of the caster mechanism in the present application (the frame body is lifted); Figure 3 is Figure 1 is the enlarged view of A in the present application; Figure 4 is the enlarged view of B in the present application; Figure 2 Figure 5 is the structure schematic diagram of the base in the present application; Figure 6 is Figure 5 ​A local enlarged view at C; Figure 7 is a structural schematic diagram of a left end caster mechanism of the base in the application; Figure 8 is a structural schematic diagram of a right end caster mechanism of the base in the application.

[0018] The reference signs in the drawing are: 1, caster, 2, lifting locking block, 201, rotation center line, 202, support surface one, 203, transition surface, 204, support surface two, 3, connecting shaft, 4, base, 5, guide mechanism, 501, guide groove, 502, limiting hole, 6, connecting rod mechanism, 601, connecting rod, 602, transmission rod, 603, connecting lug, 7, pedal. DETAILED DESCRIPTION

[0019] The application will be further described below in combination with the drawings and specific embodiments: As Figures 1-4 shown, a lifting self-locking caster mechanism is arranged below a frame body, the caster mechanism comprises a caster 1 and a lifting locking block 2, the frame body can be lifted relative to the caster mechanism and is in contact with the ground when the frame body is not lifted by the lifting locking block 2, at this time, the frame body cannot be moved by the caster 1, the caster 1 is connected with the frame body through a connecting shaft 3, one end of the connecting shaft 3 is fixedly connected with the frame body and the other end is fixedly connected with the caster 1, the lifting locking block 2 is rotationally connected with the connecting shaft 3, specifically, it can be realized through an intermediate shaft which is fixedly connected with the lifting locking block 2 at one end and rotationally connected with the connecting shaft 3 at the other end, so that the lifting locking block 2 can rotate relative to the connecting shaft 3, and the rotation center line 201 of the lifting locking block 2 is perpendicular to the axis of the connecting shaft 3, so that the lifting locking block 2 does not affect the caster 1 when rotating around the rotation center line 201, in this embodiment, the lifting locking block 2 is a block body with uniform thickness, and in the same cross section, the lifting locking block 2 is perpendicular to the frame body, the lifting locking block 2 can lift the frame body to be separated from the ground during rotation, the lifting locking block 2 has a support surface one 202, the support surface one 202 is a plane for supporting the frame body after the frame body is lifted, that is, the distance between the support surface one 202 and the rotation center line 201 is greater than the distance between the bottom end of the frame body when the frame body is not lifted and the rotation center line 201, so that when the lifting locking block 2 rotates to be in contact with the frame body by the support surface one 202, the frame body can be lifted to be separated from the ground.

[0020] During lifting of the frame body, the end of the support surface one 202 which first contacts the frame body rotates from one side of the rotation center line 201 to the other side in the rotation direction of the lifting locking block 2, specifically, as Figure 3As shown, when the frame body is not lifted, the right end of the support surface one 202 (i.e. the end first contacting the frame body) is located at the left side of the rotation center line 201, as shown in Figure 4 As shown, when the frame body is completely lifted, the right end of the support surface one 202 (i.e. the end first contacting the frame body) is located at the right side of the rotation center line 201, so that the right end of the support surface one 202 passes the rotation center line 201 of the lifting locking block 2 when the frame body is completely lifted, so that the lifting locking block 2 can maintain the current state after the frame body is lifted, i.e. because the right end of the support surface one 202 passes the rotation center line 201 of the lifting locking block 2 in the process of rotation, so that the frame body can apply a force to the lifting locking block 2 after the frame body is lifted, so that the lifting locking block 2 can maintain the current state, thereby maintaining the lifting state of the frame body, so as to realize the lifting self-locking of the frame body, and at this time the frame body is always separated from the ground, so that the frame body can be quickly moved through the caster 1, and when the frame body is not needed to be moved, the frame body can be lowered to contact the ground by reversely rotating the lifting locking block 2, at this time the frame body cannot be moved through the caster 1.

[0021] As an implementable manner, as shown in Figure 4 As shown, after the frame body is lifted, in the cross section perpendicular to the rotation center line 201, the distance from the end of the support surface one 202 first contacting the frame body to the straight line intersecting the rotation center line 201 and perpendicular to the support surface one 202 is 3-7 mm (the straight line is a dotted line as shown in Figure 4 , i.e. the stability of the lifting self-locking of the frame body can be ensured, and the smoothness of the frame body changing from the lifting state to the lowering state can be ensured.

[0022] As an implementable manner, as shown in Figure 3 As shown, the lifting locking block 2 also has a support surface two 204, and the support surface two 204 is a plane for supporting the frame body when the frame body is not lifted.

[0023] As an implementable manner, as shown in Figure 3 and Figure 4 As shown, the lifting locking block 2 also has a transition surface 203, the transition surface 203 is overall smooth, and the transition surface 203 is first contacted by the frame body compared to the support surface one 202 in the process of lifting the frame body, specifically, the transition surface 203 is located between the support surface one 202 and the support surface two 204, and the transition surface 203 is used for supporting the frame body in the process of lifting the frame body by the lifting locking block 2.

[0024] In the embodiment, the frame is supported by both the ground and the second supporting surface 204 when the frame is not lifted, so that the rotation of the lifting locking block 2 can be switched from the contact between the frame and the second supporting surface 204 to the contact between the frame and the transition surface 203, so as to perform the lifting process of the frame, and the transition surface 203 is smooth in the whole, so as to improve the smoothness of the frame during the lifting process, and gradually switched from the contact between the frame and the transition surface 203 to the contact between the frame and the first supporting surface 202, so as to complete the lifting of the frame.

[0025] The embodiment also discloses a base comprising the lifting self-locking caster mechanism. Figure 5 and Figure 6 As shown in the figure, the base 4 also comprises a frame or is a frame, the four corners of the base 4 are provided with caster mechanisms and guide mechanisms 5, the guide mechanisms 5 are used to guide the base 4 to be lifted along the length direction of the connecting shaft 3, i.e., along the vertical direction, and the lifting locking blocks 2 of the caster mechanisms at the four corners of the base 4 simultaneously act through the connecting rod mechanism 6, so as to ensure the stability of the base 4 during the lifting process.

[0026] As an implementable manner, as shown in the figure, Figures 6-8 In the embodiment, the lower part of the base 4 is a hollow shell, the connecting shaft 3 extends into the inside of the base 5, the guide mechanism 5 comprises a guide groove 501, a limiting hole 502 and a limiting piece, the limiting hole 502 is arranged on the connecting shaft 3 and transversely penetrates the connecting shaft 3, i.e., the axis of the limiting hole 502 is perpendicular to the axis of the connecting shaft 3, the guide groove 501 is arranged on the base 4 and corresponds to the position of the limiting hole 502, and the length direction of the guide groove 501 is consistent with the length direction of the connecting shaft 3, i.e., the length direction of the guide groove 501 is along the vertical direction, and the limiting piece penetrates the guide groove 501 and the limiting hole 502, specifically, the limiting piece is a bolt and a nut, the bolt penetrates the guide groove 501 and the limiting hole 502, and the nut is arranged at both ends of the bolt, but does not lock the base 4 and the connecting shaft 3, so that the base 5 can only move along the vertical direction under the limitation of the connecting shaft 3 and the guide groove 501.

[0027] As an implementable manner, as shown in the figure, Figures 6-8As shown, the connecting rod mechanism 6 includes two connecting rods 601 and a transmission rod 602, the left and right ends of the base 4 are provided with connecting rods 601, the two ends of the connecting rod 601 at the left end of the base 4 are respectively rotatably connected with the connecting shafts 3 at the left and right sides of the left end of the base 4, and the lifting locking block 2 at the left end of the base 4 is fixedly arranged on the connecting rod 601 at the left end of the base 4, the two ends of the connecting rod 601 at the right end of the base 4 are respectively rotatably connected with the connecting shafts 3 at the left and right sides of the right end of the base 4, and the lifting locking block 2 at the right end of the base 4 is fixedly arranged on the connecting rod 601 at the right end of the base 4, and the lifting locking blocks 2 at the left and right ends of the base 4 are arranged between the connecting shafts 3, the lifting locking block 2, the two ends of the transmission rod 602 are rotatably connected with the connecting rod 601 at the left end of the base 4 and the connecting rod 601 at the right end of the base 4, so that the connecting rod 601 at the left end of the base 4 can be driven to rotate by rotating the lifting locking block 2 at the left end of the base 4, the connecting rod 601 at the right end of the base 4 can be driven to rotate by the transmission rod 602, and the lifting locking block 2 at the right end of the base 4 is further driven to rotate, thereby achieving the simultaneous jacking or landing of the base 4.

[0028] As an implementable manner, the connecting rod 601 and the transmission rod 602 are rotatably connected through a connecting lug 603, the connecting lug 603 is a common plate body or a block body, one end of the connecting lug 603 is fixedly connected with the connecting rod 601, and the other end is rotatably connected with the transmission rod 602.

[0029] As an implementable manner, the lifting locking block 2 is fixedly provided with a pedal 7, the pedal 7 can drive the lifting locking block 2 to rotate, specifically, the two lifting locking blocks 2 at the left end of the base 4 are both connected with the pedal 7, the pedal 7 does not contact with the base 4 and extends to the outside of the base 4, so that the lifting locking block 2 can be driven to rotate by applying a rotating force to the pedal 7, thereby achieving the lifting of the base 4.

[0030] In this embodiment, when in use: When the base 4 needs to be moved, the worker steps on the pedal 7 and applies a force to the pedal 7 which can drive the pedal 7 to rotate, thereby driving the lifting locking block 2 to rotate, so that the contact surface between the lifting locking block 2 and the base 4 gradually changes from the second supporting surface 204 to the transition surface 203 and finally to the first supporting surface 202, thereby achieving the jacking of the base 4; since the right end of the first supporting surface 202 exceeds the rotation center line 201 of the lifting locking block 2 when the base 4 is completely lifted, the base 4 will apply a force to the lifting locking block 2 to maintain the current state, thereby achieving the lifting self-locking of the base 4 and ensuring that the base 4 can maintain the state of being separated from the ground, and then the base 4 can be moved under the action of the casters 1; When the base 4 does not need to move, the staff can drive the pedal 7 to rotate reversely by applying a force in the opposite direction to the pedal 7, thereby driving the lifting locking block 2 to rotate reversely, so that the contact surface of the lifting locking block 2 gradually changes from the supporting surface one 202 to the transition surface 203 and finally to the supporting surface two 204, thereby realizing the lowering of the base 4. Since the distance between the end of the supporting surface one 202 which is first contacted with the frame body after the base 4 is lifted and the plane perpendicular to the supporting surface one 202 and where the rotation center line 201 is located is limited, the smoothness of the base 4 from the lifting state to the lowering state can be ensured.

[0031] The embodiment also discloses a physiotherapy bed comprising the base, further comprising a bed body which is fixedly arranged above the base, and the caster 1 is a universal wheel.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-mentioned embodiments, and any equivalent or equivalent transformation or replacement of the technical solutions of the present application within the scope of the disclosure without departing from the spirit of the present application is within the protection scope of the present application.

Claims

1. A lifting self-locking caster mechanism, wherein the caster mechanism is provided below a frame, the frame can be raised and lowered relative to the caster mechanism and the frame is in contact with the ground when not raised, characterized in that: The caster mechanism comprises a caster (1) and a lifting locking block (2), wherein the caster (1) is connected to the frame via a connecting shaft (3), the lifting locking block (2) can rotate relative to the connecting shaft (3), and the rotation center line (201) of the lifting locking block (2) is perpendicular to the axis of the connecting shaft (3), and the lifting locking block (2) can lift the frame off the ground during the rotation process, and a supporting surface (202) is provided on the lifting locking block (2), and the supporting surface (202) is used to support the frame after the frame is lifted; When the lifting locking block (2) is in the process of lifting the frame, the end of the support surface (202) that first contacts the frame rotates from one side of the rotation center line (201) to the other side along the rotation direction of the lifting locking block (2), so that the lifting locking block (2) can maintain the current state after the frame is lifted.

2. The lifting and self-locking caster mechanism according to claim 1, characterized in that: After the frame is lifted, in a cross section perpendicular to the rotation centerline (201), the distance from the end of the support surface 1 (202) that first contacts the frame to a straight line that intersects the rotation centerline (201) and is perpendicular to the support surface 1 (202) is 3 to 7 mm.

3. The lifting and self-locking caster mechanism according to claim 1, characterized in that: The lifting locking block (2) also has a transition surface (203), and the transition surface (203) has a smooth transition as a whole. When the lifting locking block (2) lifts the frame, the transition surface (203) contacts the frame before the supporting surface (202), and supports the frame when the lifting locking block (2) lifts the frame.

4. The lifting and self-locking caster mechanism according to claim 3, characterized in that: The lifting locking block (2) also has a second support surface (204), and the second support surface (204) is used to support the frame when the frame is not lifted. The transition surface (203) is located between the first support surface (202) and the second support surface (204).

5. A base comprising the lifting and self-locking caster mechanism according to any one of claims 1 to 4, characterized in that: The base (4) further comprises a frame, and caster mechanisms and guide mechanisms (5) are provided at the four corners of the base (4). The guide mechanisms (5) are used to guide the base (4) to rise and fall along the length direction of the connecting shaft (3), and the lifting locking blocks (2) of the caster mechanisms at the four corners of the base (4) are simultaneously actuated through a connecting rod mechanism (6).

6. The base according to claim 5, characterized in that The guide mechanism (5) comprises a guide groove (501), a limiting hole (502) and a limiting member, wherein the limiting hole (502) is provided on the connecting shaft (3) and passes through the connecting shaft (3) transversely, the guide groove (501) is provided on the base (4) and corresponds to the position of the limiting hole (502), and the length direction of the guide groove (501) is consistent with the length direction of the connecting shaft (3), and the limiting member passes through the guide groove (501) and the limiting hole (502).

7. The base according to claim 5, characterized in that The connecting rod mechanism (6) comprises a connecting rod (601) and a transmission rod (602), the left end and the right end of the base (4) are both provided with a connecting rod (601), the two ends of the connecting rod (601) are respectively rotatably connected to the connecting shafts (3) on the front and rear sides of the base (4), and the lifting locking block (2) is fixed on the connecting rod (601), and the two ends of the transmission rod (602) are respectively rotatably connected to the connecting rod (601) on the left end of the base (4) and the connecting rod (601) on the right end of the base (4).

8. The base according to claim 7, characterized in that The connecting rod (601) and the transmission rod (602) are rotatably connected via a connecting ear (603), one end of the connecting ear (603) is fixedly connected to the connecting rod (601), and the other end is rotatably connected to the transmission rod (602).

9. The base according to claim 5, characterized in that A pedal (7) is fixedly provided on the lifting locking block (2), and the lifting locking block (2) can be driven to rotate by the pedal (7).

10. A physiotherapy bed comprising the base according to any one of claims 6 to 9, characterized in that: It also includes a bed body, which is arranged on a base, and the casters (1) are universal wheels.

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