Trundle capable of being automatically locked

Abstract

The utility model is suitable for the technical field of trundles, and provides a self-locking trundle which comprises a mounting seat, and a rotating shaft is assembled on the mounting seat through a bearing; the wheel and the gear are fixed on the rotating shaft; the gear block is arranged on one side of the mounting seat, is used for limiting the gear, can be lifted in a self-adaptive manner, and is used for limiting the gear and locking the wheel; the assembling seat is fixed on the mounting seat, a first ball head is arranged in the assembling seat, a connecting rod is fixed on the first ball head, and a second ball head is sleeved on the connecting rod; the pressing sleeve is arranged on the second ball head in a sleeving manner; and the adjusting mechanism is arranged on the connecting rod and the mounting seat and is used for adjusting the lifting of the tooth block. According to the caster capable of being automatically locked, the problem that an existing caster is prone to sliding at will and out of control in the using process is solved.

Description

Technical Field

[0001] This utility model belongs to the field of caster technology, and in particular relates to an automatically locking caster. Background Technology

[0002] In modern office environments and children's activity settings, chairs with casters are widely used because they are easy to move.

[0003] However, existing casters have a significant drawback: they are prone to sliding. In office settings, when office workers are focused on their work, even a slight external force can cause the office chair to slide out of control. In scenarios where children use the chair, children have difficulty controlling the direction and speed of the casters, and the random sliding of the child chair can easily cause collisions, threatening children's safety. Utility Model Content

[0004] This invention provides an automatically locking caster, aiming to solve the problem that casters are prone to slipping and losing control during use.

[0005] This utility model is implemented as follows: an automatically locking caster includes: a mounting base, on which a rotating shaft is mounted via bearings; a wheel and a gear fixed on the rotating shaft; a toothed block disposed on one side of the mounting base for limiting the gear and adaptively raising and lowering, used to limit and lock the wheel; an assembly base fixed on the mounting base, wherein a first ball head is disposed within the assembly base, a connecting rod is fixed to the first ball head, and a second ball head is sleeved on the connecting rod; a pressure sleeve sleeved on the second ball head; and an adjustment mechanism disposed on the connecting rod and the mounting base for adjusting the raising and lowering of the toothed block.

[0006] Preferably, the adjusting mechanism includes: a mounting shell fixed on the mounting base, a mounting rod slidably mounted inside the mounting shell, the mounting rod being fixedly connected to the toothed block; a first spring sleeved on the mounting rod; a pressure block fixed on the mounting rod for limiting the first spring; a second spring sleeved on the connecting rod; and a ball block fixed on the mounting rod, the ball block contacting the pressure sleeve.

[0007] Preferably, the pressure sleeve has an annular groove that is adapted to the ball block for limiting its position.

[0008] Preferably, a scraper for removing mud is bolted onto the mounting base.

[0009] Preferably, a mounting plate is fixed to the top of the pressure sleeve, and the mounting plate has assembly holes.

[0010] Preferably, the mounting housing has a through-hole that is adapted to the mounting rod.

[0011] Preferably, the pressure sleeve has an elliptical groove that is adapted to the second ball head.

[0012] Preferably, the mounting base has a ball groove that is adapted to the first ball head.

[0013] Compared with related technologies, the automatically locking caster provided by this utility model has the following advantages:

[0014] The ball block is limited by the annular groove of the pressure sleeve. With the help of the first and second springs in the adjustment mechanism, the tooth block automatically descends to lock the gear when a person sits down and automatically resets and unlocks when the person gets up, without the need for manual operation. Attached Figure Description

[0015] Figure 1 A front view diagram of an automatically locking caster provided by this utility model;

[0016] Figure 2 This is a schematic diagram of the front sectional view of the present invention;

[0017] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure;

[0018] Figure 4 This is a schematic diagram of the structure of the slide bar, pressure block, and ball block in this utility model.

[0019] Reference numerals: 1. Mounting base; 2. Shaft; 3. Wheel; 4. Gear; 5. Gear block; 6. Assembly base; 7. First ball head; 8. Connecting rod; 9. Second ball head; 10. Pressure sleeve; 11. Mounting plate; 12. Assembly hole; 13. Mounting shell; 14. Mounting rod; 15. First spring; 16. Ball block; 17. Second spring; 18. Annular groove; 19. Pressure block; 20. Scraper; 21. Bolt. Detailed Implementation

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] This utility model embodiment provides an automatically locking caster, such as... Figure 1-4As shown, the automatically locking caster includes: a mounting base 1, on which a rotating shaft 2 is mounted via bearings; a wheel 3 and a gear 4 fixed on the rotating shaft 2; a toothed block 5 disposed on one side of the mounting base 1 for limiting the gear 4 and adaptively raising and lowering, for limiting and locking the wheel 3; an assembly base 6 fixed on the mounting base 1, wherein a first ball head 7 is disposed within the assembly base 6, a connecting rod 8 is fixed on the first ball head 7, and a second ball head 9 is sleeved on the connecting rod 8; a pressure sleeve 10 sleeved on the second ball head 9; and an adjustment mechanism disposed on the connecting rod 8 and the mounting base 1 for adjusting the raising and lowering of the toothed block 5.

[0022] In this embodiment, during use, when a person sits on the chair, the chair legs are pressed down by gravity, and the pressure sleeve 10 moves downward accordingly. In conjunction with the adjustment mechanism, the toothed block 5 descends and locks the gear 4, thereby locking the rotating shaft 2, thus restricting the rotation of the wheel 3 and preventing the chair from sliding freely. When the person leaves the chair, the pressure disappears, and the adjustment mechanism automatically drives the toothed block 5 to rise and reset, the rotating shaft 2 resumes rotation, and the office chair can slide freely. The operation is convenient and requires no manual intervention.

[0023] This caster effectively solves the problem of existing casters easily slipping. In office settings, it automatically locks when a person sits down, preventing the office chair from going out of control due to slight external force. In scenarios where children are using the chair, the caster automatically locks when a child sits down, preventing the chair from sliding around and causing collisions, greatly reducing safety risks and providing safety for children. It combines practicality and safety.

[0024] In a further preferred embodiment of the present invention, the adjusting mechanism includes: a mounting shell 13 fixed on the mounting base 1, a mounting rod 14 slidably mounted inside the mounting shell 13, the mounting rod 14 being fixedly connected to the toothed block 5; a first spring 15 sleeved on the mounting rod 14; a pressure block 19 fixed on the mounting rod 14 for limiting the first spring 15; a second spring 17 sleeved on the connecting rod 8; and a ball block 16 fixed on the mounting rod 14, the ball block 16 being in contact with the pressure sleeve 10.

[0025] In this embodiment, when a person sits on the chair, the weight of the chair legs causes the pressure sleeve 10 to press down, pushing the ball block 16 to drive the mounting rod 14 to slide downwards. The first spring 15 is compressed, and the mounting rod 14 drives the toothed block 5 to descend and mesh with the gear 4, locking the rotating shaft 2 and the wheel 3. When the person leaves the chair, the first spring 15 returns to its original shape, pushing the mounting rod 14 to move upwards, the toothed block 5 rises and resets, and at the same time the second spring 17 resets, allowing the caster to return to a free sliding state.

[0026] The adjustment mechanism offers significant advantages. Its rationally designed mechanical structure utilizes spring force and interlocking components to automatically switch between locking and unlocking the casters, eliminating the need for complex operations.

[0027] In a further preferred embodiment of the present invention, an annular groove 18 is provided on the pressure sleeve 10, and the annular groove 18 is adapted to the ball block 16 for limiting its position.

[0028] In this embodiment, the annular groove 18 serves to limit the movement of the ball block 16, and the ball block 16 can rotate smoothly within the annular groove 18 without affecting the steering of the chair.

[0029] In a further preferred embodiment of the present invention, a scraper 20 for removing mud is mounted on the mounting base 1 by bolts 21.

[0030] In this embodiment, if dirt or other debris gets on the surface of the wheel 3 while it is rolling, the scraper 20 will come into contact with the surface of the wheel 3 as the wheel 3 rotates, and scrape off the debris using its own structure, keeping the surface of the wheel 3 clean.

[0031] In a further preferred embodiment of the present invention, a mounting plate 11 is fixed to the top of the pressure sleeve 10, and an assembly hole 12 is provided on the mounting plate 11.

[0032] In a further preferred embodiment of the present invention, the mounting shell 13 is provided with a through opening, which is adapted to the mounting rod 14.

[0033] In this embodiment, the mounting rod 14 slides up and down within the mounting housing 13, and the opening provides a precise motion guide channel for the mounting rod 14.

[0034] In a further preferred embodiment of the present invention, an elliptical groove is provided on the pressure sleeve 10, and the elliptical groove is adapted to the second ball head 9.

[0035] In this embodiment, the elliptical groove provides a stable and flexible movement space for the second ball head 9, making it less likely for the second ball head 9 to deviate or get stuck when moving within the groove.

[0036] In a further preferred embodiment of the present invention, the mounting base 6 is provided with a ball groove, which is adapted to the first ball head 7.

[0037] In this embodiment, the design of the ball groove ensures that the first ball head 7 can rotate normally to adjust its direction.

[0038] In summary, compared with related technologies, by limiting the ball block 16 through the annular groove 18 of the pressure sleeve 10, and in conjunction with the first spring 15 and the second spring 17 in the adjustment mechanism, the tooth block 5 automatically descends to lock the gear 4 when a person sits down, and automatically resets and unlocks when standing up, without the need for manual operation.

[0039] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0040] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A caster with automatic locking capability, characterized in that, include: Mounting base (1), on which a rotating shaft (2) is mounted via a bearing; Wheels (3) and gears (4) fixed on the shaft (2); A toothed block (5) is provided on one side of the mounting base (1) for limiting the gear (4) and is adaptively height-adjustable. The toothed block (5) is used to limit the gear (4) to lock the wheel (3). An assembly base (6) is fixed on the mounting base (1). A first ball head (7) is provided inside the assembly base (6). A connecting rod (8) is fixed on the first ball head (7). A second ball head (9) is sleeved on the connecting rod (8). A pressure sleeve (10) fitted onto the second ball head (9); An adjustment mechanism is provided between the connecting rod (8) and the mounting base (1) for adjusting the lifting and lowering of the toothed block (5).

2. The automatically locking caster as described in claim 1, characterized in that, The adjustment mechanism includes: A mounting shell (13) is fixed on the mounting base (1), and a mounting rod (14) is slidably installed inside the mounting shell (13). The mounting rod (14) is fixedly connected to the toothed block (5). A first spring (15) is sleeved on the mounting rod (14); A pressure block (19) fixed to the mounting rod (14) for limiting the first spring (15); A second spring (17) is sleeved on the connecting rod (8); A ball block (16) is fixed on the mounting rod (14), and the ball block (16) is in contact with the pressure sleeve (10).

3. The automatically locking caster as described in claim 2, characterized in that, The pressure sleeve (10) is provided with an annular groove (18), which is adapted to the ball block (16) for limiting its position.

4. The automatically locking caster as described in claim 1, characterized in that, A scraper (20) for removing mud is mounted on the mounting base (1) by bolts (21).

5. The automatically locking caster as described in claim 2, characterized in that, The top of the pressure sleeve (10) is fixed with a mounting plate (11), and the mounting plate (11) has an assembly hole (12).

6. The automatically locking caster as described in claim 2, characterized in that, The mounting housing (13) has an opening that is adapted to the mounting rod (14).

7. The automatically locking caster as described in claim 1, characterized in that, The pressure sleeve (10) has an elliptical groove, which is adapted to the second ball head (9).

8. The automatically locking caster as described in claim 1, characterized in that, The mounting base (6) is provided with a ball groove, which is adapted to the first ball head (7).

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