Medical trundle

Abstract

The utility model relates to the technical field of medical use, in particular to a medical trundle which comprises a support, a center shaft is arranged on the support, and idler wheels are arranged on the two sides of the support respectively and installed at the two ends of the center shaft respectively. A mounting space is formed in the lower side of the support, a brake trigger is vertically and rotatably mounted in the mounting space, the brake trigger comprises a brake plate which is arranged at the front end and obliquely faces the upper portion of the front side, and the two sides of the far end of the brake plate protrude outwards to form brake blocks correspondingly and extend into the two rolling wheels; a circle of convex teeth distributed at intervals in the circumferential direction are arranged in the middle of the inner side of the roller; the brake releasing device has the advantages of being higher in brake reliability, capable of being operated and controlled more conveniently to complete brake releasing and better in bearing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of medical treatment, in particular to a medical caster wheel. Background Art

[0002] Caster wheels are a general term for various caster wheel structures, including swivel caster wheels and fixed caster wheels. A swivel caster wheel, which is the most common universal wheel, has a structure that allows 360-degree rotation; a fixed caster wheel has no rotating structure and cannot rotate. On many devices, usually the two types of caster wheels are used in combination. For example, the structure of a trolley has two fixed wheels at the front and two swivel caster wheels near the pushing armrest at the back.

[0003] In the medical field, caster wheels are usually installed on hospital beds to facilitate the movement of the beds. However, the existing medical caster wheels have the following disadvantages: 1. The structure design of the brake part inside the medical caster wheel is not reasonable enough, resulting in poor brake reliability and inconvenient operation to release the brake; 2. Poor load-bearing effect and short service life.

[0004] Therefore, how to design a medical caster wheel with a simpler and more reasonable structure, higher brake reliability, more convenient operation to release the brake, and better load-bearing effect has become a technical problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is how to design a medical caster wheel with a simpler and more reasonable structure, higher brake reliability, more convenient operation to release the brake, and better load-bearing effect.

[0006] To achieve the above object, the utility model provides a medical caster wheel, which includes a bracket. A central shaft is arranged on the bracket. On both sides of the bracket, there are respectively provided rollers and each roller is installed at both ends of the central shaft. It is characterized in that an installation space is provided inside the lower side of the bracket and a brake trigger is rotatably installed vertically. The brake trigger includes a brake plate at the front end which is inclined upward and forward. On both sides of the distal end of the brake plate, there are respectively protruded outward to form brake blocks and each brake block correspondingly extends into the two rollers. In the middle of the inner side of the roller, there is a circle of convex teeth which are distributed at intervals along the circumferential direction. The brake trigger includes an operation plate at the rear end. A spring structure is provided below the operation plate on the bracket. A vertical pull rod is provided above the operation plate on the bracket. A pull rod pushing structure is provided between the pull rod and the bracket so that the pull rod moves downward and can overcome the thrust of the spring structure on the operation plate, so that the brake plate and the brake blocks at its distal end rotate upward and each correspondingly engages between adjacent convex teeth to complete braking; the upper end of the pull rod extends upward and passes through the installation hole on the bracket to form an operation end.

[0007] In this way, in the above-mentioned medical casters structure, it is in the braking state in the initial state. When in the braking state, under the action of the pull rod pushing structure, the pull rod overcomes the thrust of the spring structure on the operation plate, so that the brake plate and the brake block at its distal end rotate upward and are held in the adjacent teeth. When the braking state needs to be released, the operation end is manually operated, so that the pull rod overcomes the thrust of the pull rod pushing structure and moves upward. At the same time, the spring structure pushes the operation plate and makes the operation plate rotate upward, so that the brake plate and the brake block at its distal end rotate downward and disengage from between the adjacent teeth, releasing the brake. The braking structure of the above casters can better brake the rollers on both sides. By clamping the brake block into the card slots formed by the adjacent teeth, the reliability of braking can be improved; and only by operating the pull rod to move upward can the brake be released, which can make the operation of releasing the brake more convenient and the release of the brake more reliable.

[0008] Furthermore, the distal end of the brake plate is integrally bent into an arc-shaped structure design, and the end face of the brake block is designed to be an arc-shaped structure.

[0009] In this way, it is more convenient for the brake block to be clamped into the card slots formed by two adjacent teeth during braking, and it is also more convenient for the brake block to disengage from the card slots formed by two adjacent teeth when releasing the brake.

[0010] As an optimization, the bracket includes a bracket surrounding plate that is integrally bent into a superior arc shape on the upper side. A horizontal bracket bottom plate is integrally formed on the opening side of the bracket surrounding plate; an installation cylinder is provided at the center position of the bracket surrounding plate, and the central shaft is installed in the installation cylinder; support connection structures are provided between the upper side of the bracket surrounding plate and the installation cylinder, between the front side of the bracket surrounding plate and the installation cylinder, and between the front end of the bracket bottom plate and the installation cylinder; an installation space is formed between the rear end of the bracket bottom plate and the installation cylinder and between the installation cylinder and the rear side of the bracket surrounding plate, and the brake trigger is installed and arranged therein.

[0011] In this way, the overall structure design of the bracket is simpler and more reasonable, which can improve the load-bearing capacity of the bracket; and while the bracket can better meet the installation and support requirements, it can better avoid contact with the ground. The structural layout is also more reasonable, which can make it more convenient to arrange the brake trigger.

[0012] As an optimization, an installation block is provided on the support bottom plate. The brake trigger includes an installation plate in the middle and corresponding to the upper side of the front end of the installation block. The two sides of the installation plate are each bent downward to form hinge blocks and are respectively arranged on both sides of the installation block. A hinge shaft is provided on the installation block, and both ends of the hinge shaft are respectively inserted and installed on the two hinge blocks.

[0013] In this way, the structural design of the brake trigger is more reasonable and it is also more convenient for installation and arrangement.

[0014] As an optimization, the rear end of the mounting plate extends obliquely upward toward the rear side to form an inclined plate, and the operating plate is connected and arranged at the upper end of the inclined plate; the spring structure includes a conical spring arranged between the operating plate and the mounting block, and both ends of the conical spring respectively abut and support on the lower surface of the operating plate and the upper surface of the mounting block.

[0015] In this way, the structural design is more compact, and it is also more convenient to install and arrange the conical spring.

[0016] As an optimization, a limiting boss is arranged on the upper surface of the rear end of the mounting block and inserted into the lower end of the conical spring, and the rear end of the operating plate has an extending block bent downward and correspondingly inserted into the upper end of the conical spring.

[0017] In this way, after the conical spring is installed, its position is more stable, improving its working reliability.

[0018] As an optimization, a mounting tube is installed in the mounting hole, and the pull rod is arranged in the mounting tube; the push structure of the pull rod includes a helical spring sleeved on the lower end of the pull rod, a pull rod head is arranged at the lower end of the pull rod, a gasket is arranged above the pull rod head on the pull rod, and both the upper and lower ends of the helical spring respectively abut and support on the lower end face of the mounting tube and the upper surface of the gasket.

[0019] In this way, by providing the mounting tube, it is more convenient to arrange the pull rod; secondly, by providing the helical spring, the pull rod has a downward movement tendency in the mounting tube, the structure is simpler, and it can better maintain its downward movement tendency, better ensuring the reliability of the brake.

[0020] As an optimization, a limiting circlip is arranged at the lower end of the mounting tube, and a positioning ring protruding outward in a circle is arranged at the upper end of the mounting tube.

[0021] In this way, the installation of the mounting tube is simpler and more convenient, and it is more convenient for disassembly and assembly.

[0022] As an optimization, the roller includes an outer roller sleeve designed in a circular ring shape, a circular roller plate is integrally formed in the middle of the axial direction of the roller sleeve, a circular tube-shaped connecting cylinder protrudes inward in the middle of the roller plate, a circular ring-shaped reinforcing ring is arranged outside the connecting cylinder, and the convex teeth are arranged outside the reinforcing ring.

[0023] In this way, the structural design of the roller is more reasonable, and the load-bearing capacity of the roller is better; the reinforcing ring is arranged on the outer side of the connecting cylinder, and the convex teeth are arranged on the outer side of the reinforcing ring, making the distance between the convex teeth and the rotation center more reasonable, which is more beneficial for braking.

[0024] As an optimization, the roller further includes a rubber-coated wheel sleeved outside the roller sleeve.

[0025] In this way, by designing the rubber-coated wheel, it can better achieve silent rolling.

[0026] As an optimization, a decorative cover with a circular plate-like structure is also provided on the outer side of the roller plate.

[0027] In this way, the whole caster is made more beautiful.

[0028] To sum up, the above-mentioned medical caster structure has the characteristics of simpler and more reasonable structure, higher brake reliability, more convenient operation to release the brake, and better load-bearing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an exploded structure schematic diagram of the medical caster in the specific embodiment of the present invention.

[0030] Figure 2 It is Figure 1 The structure schematic diagram after rotating by an angle.

[0031] Figure 3 It is Figure 2 The structure schematic diagram after omitting one side of the rollers.

[0032] Figure 4 It is Figure 2 The structure schematic diagram after omitting both sides of the rollers.

[0033] Figure 5 It is Figure 4 The structure schematic diagram after rotating by an angle.

[0034] Figure 6 It is Figure 1 The structure schematic diagram of the middle roller.

[0035] Figure 7 It is Figure 1 The structure schematic diagram of the brake trigger in it. SPECIFIC EMBODIMENTS

[0036] The present invention will be further described below in conjunction with the drawings and embodiments. It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific manner, and therefore should not be construed as a limitation of the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] Such as Figures 1 to 7Shown is a medical caster, including a bracket 1, on which a central shaft 2 is provided. On both sides of the bracket, there are respective rollers 3, each of which is installed at both ends of the central shaft. Inside the lower side of the bracket, there is an installation space 4, and a brake trigger 5 is rotatably installed vertically. The brake trigger includes a brake plate 6 at the front end, which is inclined upward and forward. On both sides of the distal end of the brake plate, there are respective outward protrusions forming brake blocks 7, which respectively extend into the inner sides of the two rollers. In the middle of the inner side of the roller, there is a circle of convex teeth 8 distributed at intervals along the circumferential direction. The brake trigger includes an operation plate 9 at the rear end. Below the operation plate on the bracket, there is a spring structure. Above the operation plate on the bracket, there is a vertical pull rod 10. Between the pull rod and the bracket, there is a pull rod pushing structure so that the pull rod moves downward and can overcome the thrust of the spring structure on the operation plate, so that the brake plate and the brake blocks at its distal end rotate upward and respectively engage between adjacent convex teeth to complete braking; the upper end of the pull rod extends upward and passes through the installation hole on the bracket to form an operation end.

[0038] In this way, in the above-mentioned medical caster structure, in the initial state, it is in the braking state. In the braking state, under the action of the pull rod pushing structure, the pull rod overcomes the thrust of the spring structure on the operation plate, so that the brake plate and the brake blocks at its distal end rotate upward and remain engaged between adjacent convex teeth. When the braking state needs to be released, the operation end is manually operated, so that the pull rod overcomes the thrust of the pull rod pushing structure and moves upward. At the same time, the spring structure pushes the operation plate and makes the operation plate rotate upward, so that the brake plate and the brake blocks at its distal end rotate downward and disengage from between adjacent convex teeth, releasing the brake. The braking structure of the above casters can better brake the rollers on both sides. By engaging the brake blocks between the card slots formed by adjacent convex teeth, the reliability of braking can be improved; and only by operating the pull rod to move upward, the brake can be released, which can make the operation of releasing the brake more convenient and the release of the brake more reliable.

[0039] Furthermore, the distal end of the brake plate is integrally bent into an arc-shaped structure design, and the end face of the brake block is also designed to be arc-shaped.

[0040] In this way, it is more convenient for the brake block to engage between the card slots formed by adjacent convex teeth during braking, and it is also more convenient for the brake block to disengage from the card slots formed by adjacent convex teeth when releasing the brake.

[0041] In this specific embodiment, the bracket includes a bracket enclosing plate 11 that is integrally and preferably arc-shapedly bent and arranged on the upper side, and a horizontal bracket bottom plate 12 is integrally formed on the opening side of the bracket enclosing plate; an installation cylinder 13 is arranged at the central position of the bracket enclosing plate, and the central shaft is installed in the installation cylinder; support connection structures are arranged between the upper side of the bracket enclosing plate and the installation cylinder, between the front side of the bracket enclosing plate and the installation cylinder, and between the front end of the bracket bottom plate and the installation cylinder; an installation space is formed between the rear end of the bracket bottom plate and the installation cylinder and between the installation cylinder and the rear side of the bracket enclosing plate, and the brake trigger is installed and arranged therein.

[0042] In this way, the overall structural design of the bracket is simpler and more reasonable, which can improve the load-bearing capacity of the bracket; and while the bracket can better meet the installation and support requirements, it can better avoid contact with the ground. The structural layout is also more reasonable, which can more conveniently arrange the brake trigger.

[0043] In this specific embodiment, an installation block 14 is arranged on the support bottom plate, and the brake trigger includes a mounting plate 15 in the middle and corresponding to the upper front of the installation block. The two sides of the mounting plate are each bent downward to form hinge blocks 16 and are respectively arranged on both sides of the installation block. A hinge shaft 17 is arranged on the installation block, and both ends of the hinge shaft are respectively inserted and installed on the two hinge blocks.

[0044] In this way, the structural design of the brake trigger is more reasonable and it is also more convenient to install and arrange.

[0045] In this specific embodiment, the rear end of the mounting plate extends obliquely upward to the rear side to form an inclined plate 18, and the operating plate is connected to the upper end of the inclined plate; the spring structure includes a conical spring 19 arranged between the operating plate and the installation block, and both ends of the conical spring respectively abut and support on the lower surface of the operating plate and the upper surface of the installation block.

[0046] In this way, the structural design is more compact and it is also more convenient to install and arrange the conical spring.

[0047] In this specific embodiment, a limiting boss is arranged on the upper surface of the rear end of the installation block and is inserted into the lower end of the conical spring, and the rear end of the operating plate has an extending block 20 bent downward and correspondingly inserted into the upper end of the conical spring.

[0048] In this way, after the conical spring is installed, its position is more stable, improving its working reliability.

[0049] In this specific embodiment, an installation tube 21 is installed in the installation hole, and the pull rod is arranged in the installation tube; the pull rod pushing structure includes a helical spring 22 sleeved on the lower end of the pull rod, a pull rod head 23 is arranged at the lower end of the pull rod, a gasket 24 is arranged above the pull rod head on the pull rod, and both the upper and lower ends of the helical spring respectively abut and support on the lower end surface of the installation tube and the upper surface of the gasket.

[0050] In this way, by providing the installation pipe, it is more convenient to arrange the pull rod. Secondly, by providing the spiral spring, the pull rod has a downward movement tendency in the installation pipe, the structure is simpler, it can better maintain the downward movement tendency of the retainer, and better ensure the reliability of the brake.

[0051] In this specific embodiment, a limit snap ring 25 is provided at the lower end of the installation pipe, and a positioning ring 26 protruding outward in a circular shape is provided at the upper end of the installation pipe.

[0052] In this way, the installation of the installation pipe is simpler and more convenient, and it is more convenient to disassemble and assemble.

[0053] In this specific embodiment, the roller includes an outer roller sleeve 27 designed in a circular ring shape. A circular roller plate 28 is integrally formed in the middle of the axial direction of the roller sleeve. A circular tube-shaped connecting cylinder 29 protrudes inward in the middle of the roller plate. A circular reinforcing ring 30 is provided outside the connecting cylinder, and the convex teeth are provided outside the reinforcing ring.

[0054] In this way, the structural design of the roller is more reasonable, and the load-bearing capacity of the roller is better. The reinforcing ring is provided on the outer side of the connecting cylinder, and the convex teeth are provided on the outer side of the reinforcing ring, making the distance between the convex teeth and the rotation center more reasonable, which is more beneficial for braking.

[0055] In this specific embodiment, the roller further includes a rubber-coated wheel 31 sleeved outside the roller sleeve.

[0056] In this way, by designing the rubber-coated wheel, it can better achieve silent rolling.

[0057] In this specific embodiment, a decorative cover 32 designed in a circular plate shape is further provided on the outer side of the roller plate.

[0058] In this way, the whole caster is made more beautiful.

[0059] In summary, the above-mentioned medical caster structure has the characteristics of simpler and more reasonable structure, higher brake reliability, more convenient operation to release the brake, and better load-bearing effect.

[0060] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A medical caster, comprising a bracket, a central axis is arranged on the bracket, and rollers are arranged on both sides of the bracket and are respectively installed at both ends of the central axis; characterized in that: An installation space is provided inside the lower side of the bracket and a brake trigger is installed vertically rotatably. The brake trigger includes a brake plate at the front end which is inclined toward the upper front side. Both sides of the far end of the brake plate protrude outward to form brake blocks and extend into the two rollers respectively. A circle of convex teeth distributed at intervals along the circumferential direction is provided in the middle of the inner side of the roller; the brake trigger includes an operating plate at the rear end, a spring structure is provided below the operating plate on the bracket, a vertical pull rod is provided above the operating plate on the bracket, and a pull rod pushing structure is provided between the pull rod and the bracket to enable the pull rod to move downward and overcome the thrust of the spring structure on the operating plate, so that the brake plate and the brake blocks at its far end rotate upward and are respectively inserted into adjacent convex teeth to complete braking; the upper end of the pull rod extends upward and passes through the mounting hole on the bracket to form an operating end.

2. A medical caster according to claim 1, characterized in that: The bracket includes a bracket enclosure on the upper side that is bent in an overall arc shape, and a horizontal bracket base plate is integrally formed on the opening side of the bracket enclosure; a mounting tube is provided at the center position of the bracket enclosure, and the center axis is installed in the mounting tube; a supporting connection structure is provided between the upper side of the bracket enclosure and the mounting tube, between the front side of the bracket enclosure and the mounting tube, and between the front end of the bracket base plate and the mounting tube; the mounting space is formed between the rear end of the bracket base plate and the mounting tube, and between the mounting tube and the rear side of the bracket enclosure, and the brake trigger is installed.

3. A medical caster according to claim 2, characterized in that: A mounting block is arranged on the supporting bottom plate, and the brake trigger includes a mounting plate in the middle portion and correspondingly arranged above the front end of the mounting block. Both sides of the mounting plate are bent downward to form hinge blocks and are correspondingly arranged on both sides of the mounting block. A hinge shaft is arranged on the mounting block, and both ends of the hinge shaft are respectively plugged and installed on the two hinge blocks.

4. A medical caster as claimed in claim 3, characterized in that: The rear end of the mounting plate extends obliquely upward toward the rear side to form an inclined plate, and the operating plate is connected to the upper end of the inclined plate; the spring structure includes a tower-shaped spring arranged between the operating plate and the mounting block, and the two ends of the tower-shaped spring are respectively supported on the lower surface of the operating plate and the upper surface of the mounting block.

5. A medical caster as claimed in claim 4, characterized in that: A limited boss is arranged on the upper surface of the rear end of the mounting block and is inserted into the lower end of the tower spring. The rear end of the operating plate is provided with an extension block bent downward and correspondingly inserted into the upper end of the tower spring.

6. The medical caster according to claim 1, characterized in that: A mounting tube is installed in the mounting hole, and the pull rod is arranged in the mounting tube; the pull rod pushing structure includes a coil spring sleeved on the lower end of the pull rod, a pull rod head is arranged at the lower end of the pull rod, and a gasket is arranged above the pull rod head on the pull rod, and the upper and lower ends of the coil spring are respectively abutted and supported on the lower end surface of the mounting tube and the upper surface of the gasket.

7. The medical caster according to claim 6, characterized in that: A limited position retaining spring is arranged at the lower end of the installation tube, and a circle of positioning ring protruding outwards is arranged at the upper end of the installation tube.

8. The medical caster according to claim 1, characterized in that: The roller includes an outer roller sleeve with a circular ring design, a circular roller plate is integrally formed in the axial middle part of the roller sleeve, the middle part of the roller plate protrudes inward to form a circular tubular connecting tube, a ring-shaped reinforcement ring is provided on the outside of the connecting tube, and the convex teeth are provided on the outside of the reinforcement ring.

9. The medical caster according to claim 8, characterized in that: The roller also includes a rubber-covered wheel sleeved on the outside of the roller sleeve.

10. The medical caster according to claim 8, characterized in that: A decorative cover with a circular plate-shaped structure is also arranged on the outer side of the roller plate.

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