Lockable air pressure lever structure

Abstract

The utility model discloses a lockable air pressure rod structure, including air pressure rod core, limit ring table, limit cylinder and elastic part, air pressure rod core outside is successively sleeved with inner sleeve and outer sleeve, and limit ring table is slidably sleeved on the inner sleeve, and limit cylinder is fixedly sleeved on the inner sleeve, and limit cylinder and the end portion of outer sleeve abut, and the opposite end surface of limit ring table and limit cylinder is equipped with first limit gear ring and second limit gear ring respectively, and elastic part sets up between limit ring table and limit cylinder, limit ring table slides along the inner sleeve to be close to limit cylinder to make first limit gear ring and second limit gear ring engage, realizes the rotary position of air pressure rod core, and the product plays the role of locking position to the rotation of air pressure rod through limit ring table and limit cylinder, and the user can freely switch the state that air pressure rod is in rotary position, makes air pressure rod unable to drive seat rotation, reduces the degree of freedom of air pressure rod.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic rod technology, and in particular to a lockable pneumatic rod structure. Background Technology

[0002] As an important structural component of the seat, the gas spring mainly provides support for the entire seat and the user. At the same time, the gas spring can be controlled by the pressure rod to extend and slide the gas spring to complete the height adjustment of the seat. The inner core of the gas spring can rotate to adjust the direction of the seat cushion, but it cannot limit the rotation of the gas spring.

[0003] In existing technologies, the rotation limit of the pneumatic rod is often achieved by mechanical stops or gas pressure adjustment. These methods have problems such as complex structure, inconvenient adjustment and low limit accuracy. In addition, after long-term use, the limit is prone to failure due to wear, which affects the safety and stability of use and makes it difficult to meet the user's demand for precise control of the seat. Therefore, there is an urgent need for a more reasonable pneumatic rod structure. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, where the pneumatic rod cannot limit rotation control, this invention provides a lockable pneumatic rod structure.

[0005] To achieve the above objectives, this utility model provides a lockable pneumatic rod structure, comprising: The inner core of the pneumatic rod is surrounded by an inner sleeve and an outer sleeve in sequence. The limiting and locking assembly includes a limiting ring, a limiting cylinder, and an elastic element. The limiting ring is slidably sleeved on the inner sleeve, and the limiting cylinder is fixedly sleeved on the inner sleeve, with the end of the limiting cylinder abutting against the outer sleeve. The opposite end faces of the limiting ring and the limiting cylinder are respectively provided with a first limiting gear ring and a second limiting gear ring. The elastic element is disposed between the limiting ring and the limiting cylinder. The limiting ring slides along the inner sleeve to approach the limiting cylinder, so that the first limiting gear ring and the second limiting gear ring mesh, thereby achieving rotational limiting of the inner core of the pneumatic rod.

[0006] As an improvement of this utility model, a rotating sleeve and a locking sleeve are sequentially fitted onto the outer sleeve. The end of the limiting ring platform abuts against the inner end face of the locking sleeve and the outer end face of the rotating sleeve. The limiting cylinder and the cylindrical surface of the outer sleeve are respectively provided with a first fixing hole and a second fixing hole. The outer wall surfaces of the rotating sleeve and the locking sleeve are respectively provided with a first oblique sliding hole and a second oblique sliding hole. The first oblique sliding hole and the second oblique sliding hole are arranged opposite to each other. A limiting pin is embedded in the first fixing hole. The limiting pin passes through the second fixing hole, the first oblique sliding hole and the second oblique sliding hole in sequence, and slides along the hole walls of the first oblique sliding hole and the second oblique sliding hole to adjust the axial position of the rotating sleeve and the locking sleeve.

[0007] As an improvement of this utility model, both ends of the first oblique sliding hole and the second oblique sliding hole are provided with a first stopping point and a second stopping point. When the limiting pin moves to the first stopping point, the locking sleeve drives the rotating sleeve to move toward the limiting cylinder. The rotating sleeve presses the limiting ring platform close to the limiting cylinder, and the first limiting gear ring and the second limiting gear ring mesh with each other. When the limiting pin moves to the second stopping point, the limiting ring platform moves away from the limiting cylinder, and the first limiting gear ring and the second limiting gear ring disengage from each other.

[0008] As an improvement of this utility model, the elastic element is a return spring, which is sleeved between the limiting ring platform and the limiting cylinder, with one end of the return spring abutting the end face of the limiting ring platform and the other end abutting the end face of the limiting cylinder.

[0009] As an improvement of this utility model, the inner sleeve is prismatic, and the shape of the limiting ring platform and the inner sleeve mating part are adapted.

[0010] As an improvement of this utility model, the outer wall surface of the locking sleeve is provided with a rotating handle that facilitates the force applied to the locking sleeve.

[0011] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model provides a lockable pneumatic rod structure, including a pneumatic rod and a limiting locking assembly. The pneumatic rod is fitted with an inner sleeve that can slide along the pneumatic rod. The limiting locking assembly includes a limiting ring platform and a limiting cylinder. The limiting ring platform is slidably fitted on the inner sleeve, and the limiting cylinder is fixedly fitted on the inner sleeve, with the end of the limiting cylinder abutting against the end of the outer sleeve. The opposite end faces of the limiting ring platform and the limiting cylinder are respectively provided with a first limiting gear ring and a second limiting gear ring. The limiting ring platform slides along the inner sleeve to approach the limiting cylinder, so that the first limiting gear ring and the second limiting gear ring mesh, thereby realizing the rotational limiting of the pneumatic rod core. This product uses the limiting ring platform and the limiting cylinder to lock and limit the rotation of the pneumatic rod. Users can freely switch the pneumatic rod to the rotational limiting state, preventing the pneumatic rod from driving the seat to rotate and reducing the degree of freedom of the pneumatic rod. Attached Figure Description

[0012] Figure 1 This is an exploded view of the present invention; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a first cross-sectional view of the present invention; Figure 4 This is a second cross-sectional view of the present invention.

[0013] The symbols for the main components are explained below: 1. Inner core of the pneumatic rod; 2. Inner sleeve; 3. Limiting and locking assembly; 31. Limiting ring platform; 311. First limiting gear ring; 32. Limiting cylinder; 321. Second limiting gear ring; 322. First fixing hole; 4. Rotating sleeve; 41. First oblique sliding hole; 5. Locking sleeve; 51. Second oblique sliding hole; 6. Limiting pin; 7. Return spring; 8. First stopping point; 9. Second stopping point; 10. Rotating handle; 11. Outer sleeve; 110. Second fixing hole. Detailed Implementation

[0014] To more clearly illustrate this utility model, the following description, in conjunction with the accompanying drawings, will provide a further picture.

[0015] In the following description, examples and details are given to provide a more in-depth understanding of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the specific embodiments described are only used to explain the present invention and are not intended to limit the present invention.

[0016] It should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the said feature, integral, step, operation, element, or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, or combinations thereof.

[0017] Please see Figures 1-4 The present invention provides a lockable pneumatic rod structure, comprising: The inner core 1 of the pneumatic rod is surrounded by an inner sleeve 2 and an outer sleeve 11 in sequence. The limiting and locking assembly 3 includes a limiting ring 31, a limiting cylinder 32, and an elastic element. The limiting ring 31 is slidably sleeved on the inner sleeve 2, and the limiting cylinder 32 is fixedly sleeved on the inner sleeve 2, with the limiting cylinder 32 abutting against the end of the outer sleeve 11. The opposite end faces of the limiting ring 31 and the limiting cylinder 32 are respectively provided with a first limiting gear ring 311 and a second limiting gear ring 321. The elastic element is disposed between the limiting ring 31 and the limiting cylinder 32. The limiting ring 31 moves along... The inner sleeve 2 slides closer to the limiting cylinder 32, so that the first limiting gear ring 311 and the second limiting gear ring 321 mesh, thereby limiting the rotation of the pneumatic rod inner core 1. The pneumatic rod inner core 1 mainly achieves its own rotation limitation through the cooperation between the limiting ring platform 31 and the limiting cylinder 32. Since the limiting cylinder 32 is fixedly connected to the pneumatic rod inner core 1, the limiting ring platform 31 cannot rotate when the first limiting gear ring 311 and the second limiting gear ring 321 are engaged. Consequently, the inner core 1 of the gas spring is also restricted from rotating due to the limiting ring 31. When the first limiting gear ring 311 and the second limiting gear ring 321 disengage, the inner core 1 of the gas spring can rotate normally, but cannot be extended or retracted. Compared with the single-tooth limiting structure of the prior art, the limiting gear ring of this application has higher stability and fitting accuracy when engaged. Through the above limiting structure, this product can be applied to products such as standing chairs. When a user uses a standing chair, the user's buttocks rest on the chair. Due to the weight applied to the chair, the inner core 1 of the gas spring will be subjected to force, causing the inner core 1 of the gas spring to rotate, which may lead to the user falling or other risks. This product can lock and limit the rotation of the inner core 1 of the gas spring through the limiting ring 31 and the limiting cylinder 32. The user can freely switch the inner core 1 of the gas spring to the state of rotation limitation, so that the inner core 1 of the gas spring cannot rotate, and the user can stay stably on the chair.

[0018] In this embodiment, a rotating sleeve 4 and a locking sleeve 5 are sequentially fitted onto the outer sleeve 11. The end of the limiting ring platform 31 abuts against the inner end face of the locking sleeve 5 and the outer end face of the rotating sleeve 4. The cylindrical surfaces of the limiting cylinder 32 and the outer sleeve 11 are respectively provided with a first fixing hole 322 and a second fixing hole 110. The outer walls of the rotating sleeve 4 and the locking sleeve 5 are respectively provided with a first oblique sliding hole 41 and a second oblique sliding hole 51. The first oblique sliding hole 41 and the second oblique sliding hole 51 are arranged opposite to each other. A limiting pin 6 is embedded in the first fixing hole 322. The limiting pin 6 passes through the second fixing hole 110, the first oblique sliding hole 41 and the second oblique sliding hole 51 in sequence, and slides along the hole walls of the first oblique sliding hole 41 and the second oblique sliding hole 51 to adjust the axial position of the rotating sleeve 4 and the locking sleeve 5. The limiting ring platform 31 is slidably disposed on the inner core 1 of the pneumatic rod. On sleeve 2, by applying an external force to the locking sleeve 5 to make it rotate, since the limiting pin 6 itself is fixed when the locking sleeve 5 rotates, the limiting pin 6 will change its position in the second oblique sliding hole 51 to make the locking sleeve 5 axially displace. Similarly, the rotating sleeve 4 also moves towards the limiting cylinder 32 due to the movement of the locking sleeve 5. At this time, the limiting ring platform 31 is also pressed by the rotating sleeve 4 and moves towards the limiting cylinder 32 in sync, so that the first limiting tooth ring 311 and the second limiting tooth ring 321 enter and maintain the meshing state. When the external force drives the locking sleeve 5 to rotate, the limiting pin 6 drives the rotating sleeve 4 to slide along the axial direction of the pneumatic rod inner core 1 to release the pressure on the limiting ring platform 31, so that the first limiting tooth ring 311 and the second limiting tooth ring 321 disengage, realizing the free switching between the rotation limiting state or the limiting release state of the pneumatic rod inner core 1.

[0019] In this embodiment, both ends of the first oblique sliding hole 41 and the second oblique sliding hole 51 are provided with a first stopping point 8 and a second stopping point 9. When the limiting pin 6 moves to the first stopping point 8, the limiting ring platform 31 approaches the limiting cylinder 32, and the first limiting gear ring 311 and the second limiting gear ring 321 mesh with each other. The first stopping point 8 and the second stopping point 9 can provide different states for the pneumatic rod. When the limiting pin 6 moves to the second stopping point 9, the limiting cylinder 32 moves away from the limiting ring platform 31, and the first limiting gear ring 311 and the second limiting gear ring 321 disengage from each other. When the limiting pin 6 is at the first stopping point 8, the inner core 1 of the pneumatic rod is in a rotationally locked state, and the rotational freedom of the inner core 1 of the pneumatic rod is restricted. At this time, the standing chair can maintain a relatively fixed posture, providing stable support for the user. It is suitable for scenarios where the user needs to maintain the same sitting posture for a long time, such as focusing on work in the office or reading quietly in leisure. When the limiting pin 6 moves to the second stopping point 9, the limiting cylinder 32 separates from the limiting ring platform 31, the first limiting gear ring 311 and the second limiting gear ring 321 no longer mesh with each other, the rotation restriction of the inner core 1 of the gas spring is released, and the standing chair can be rotated and adjusted according to the user's movements to meet the user's needs in different usage states. For example, when the user wants to change sitting posture or perform some simple activities, the chair can be adjusted directly.

[0020] In this embodiment, the elastic element is a return spring 7, which is sleeved between the limiting ring platform 31 and the limiting cylinder 32. One end of the return spring 7 abuts against the end face of the limiting ring platform 31, and the other end abuts against the end face of the limiting cylinder 32. The return spring 7 provides an auxiliary reset function for the entire limiting locking assembly 3. When an external force causes the limiting pin 6 to move, it drives the limiting ring platform 31 to slide, so that the first limiting gear ring 311 and the second limiting gear ring 321 mesh. The return spring 7 is squeezed by the limiting ring platform 31, causing its elastic force to accumulate. When the first limiting gear ring 311 and the second limiting gear ring 321 disengage, the return spring 7 releases the accumulated elastic force to assist the user in pushing the limiting ring platform 31 back to the initial position, so that the first limiting gear ring 311 and the second limiting gear ring 321 are completely separated, thereby releasing the rotation limit of the pneumatic rod inner core 1. This greatly improves the convenience and reliability of use, eliminates the need for users to perform complex manual reset operations, and also improves the user experience.

[0021] In this embodiment, the inner sleeve 2 is prismatic, and the shape of the limiting ring platform 31 and the inner sleeve 2 are adapted to each other. The fixed end design of the prismatic structure can enhance the connection stability between the inner core 1 of the pneumatic rod and the limiting cylinder 32, and avoid slippage or misalignment during rotation or sliding. This makes the engagement and disengagement of the first limiting tooth ring 311 and the second limiting tooth ring 321 easier. At the same time, the prismatic structure also improves the overall torsional strength of the inner core 1 of the pneumatic rod, extends its service life, and reduces wear problems caused by long-term use.

[0022] In this embodiment, the outer wall of the locking sleeve 5 is provided with a rotating handle 10 that facilitates the application of force to the locking sleeve 5. When the locking sleeve 5 rotates, the limiting pin 6 will encounter certain resistance in the first oblique sliding hole 41 and the second oblique sliding hole 51 and transmit it to the locking sleeve 5, making it difficult to rotate. The rotating handle 10 makes it easier for the user to apply force when applying rotational force to the locking sleeve 5, reducing the difficulty of rotational operation, ensuring that the user can hold it comfortably during rotation, and can apply sufficient torque to overcome the resistance generated when the limiting pin 6 moves in the oblique sliding hole. In this way, whether it is a user with less strength or a user who needs to frequently adjust the state of the pneumatic rod inner core 1, they can easily control the rotation of the locking sleeve 5 by rotating the handle 10, thereby realizing the free switching between the rotational limiting state and the sliding limiting state of the pneumatic rod inner core 1.

[0023] The advantages of this utility model are: 1. The extension and rotation of the pneumatic rod are stopped. Based on the limiting ring and limiting cylinder of the limiting locking component, the pneumatic rod can switch between rotation limit and rotation limit release. While retaining the extension and rotation functions of the pneumatic rod, the pneumatic rod can be in a rotation lock state.

[0024] 2. This product can be used with a standing chair. The rotation limit of the gas spring ensures that the gas spring will not rotate due to gravity when the user is standing or leaning against it, thus ensuring the user's safety.

[0025] The above-disclosed embodiments are only a few specific examples of this utility model. However, this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A lockable pneumatic rod structure, characterized in that, include: The inner core of the pneumatic rod is surrounded by an inner sleeve and an outer sleeve in sequence. The limiting and locking assembly includes a limiting ring, a limiting cylinder, and an elastic element. The limiting ring is slidably sleeved on the inner sleeve, and the limiting cylinder is fixedly sleeved on the inner sleeve, with the end of the limiting cylinder abutting against the outer sleeve. The opposite end faces of the limiting ring and the limiting cylinder are respectively provided with a first limiting gear ring and a second limiting gear ring. The elastic element is disposed between the limiting ring and the limiting cylinder. The limiting ring slides along the inner sleeve to approach the limiting cylinder, so that the first limiting gear ring and the second limiting gear ring mesh, thereby achieving rotational limiting of the inner core of the pneumatic rod.

2. The lockable pneumatic rod structure according to claim 1, characterized in that, A rotating sleeve and a locking sleeve are sequentially fitted onto the outer sleeve. The end of the limiting ring abuts against the inner end face of the locking sleeve and the outer end face of the rotating sleeve. The limiting cylinder and the cylindrical surface of the outer sleeve are respectively provided with a first fixing hole and a second fixing hole. The outer wall surfaces of the rotating sleeve and the locking sleeve are respectively provided with a first oblique sliding hole and a second oblique sliding hole. The first oblique sliding hole and the second oblique sliding hole are arranged opposite to each other. A limiting pin is embedded in the first fixing hole. The limiting pin passes through the second fixing hole, the first oblique sliding hole and the second oblique sliding hole in sequence, and slides along the hole walls of the first oblique sliding hole and the second oblique sliding hole to adjust the axial position of the rotating sleeve and the locking sleeve.

3. The lockable pneumatic rod structure according to claim 2, characterized in that, Both ends of the first and second oblique sliding holes are provided with a first stopping point and a second stopping point. When the limiting pin moves to the first stopping point, the locking sleeve drives the rotating sleeve to move toward the limiting cylinder. The rotating sleeve presses the limiting ring platform close to the limiting cylinder, and the first limiting gear ring and the second limiting gear ring mesh with each other. When the limiting pin moves to the second stopping point, the limiting ring platform moves away from the limiting cylinder, and the first limiting gear ring and the second limiting gear ring disengage from each other.

4. The lockable pneumatic rod structure according to claim 3, characterized in that, The elastic element is a return spring, which is sleeved between the limiting ring platform and the limiting cylinder, with one end of the return spring abutting the end face of the limiting ring platform and the other end abutting the end face of the limiting cylinder.

5. The lockable pneumatic rod structure according to claim 1, characterized in that, The inner sleeve is prismatic, and the shape of the limiting ring platform is adapted to the shape of the mating part of the inner sleeve.

6. The lockable pneumatic rod structure according to claim 2, characterized in that, The outer wall of the locking sleeve is provided with a rotating handle that facilitates the application of force to the locking sleeve.

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