Tray for seat and seat
By setting bearing holes on the base and bottom shell of the seat tray and using POM material and copper bushings, the noise problem when the seat user tilts back is solved, and the service life and connection stability of the seat are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-03
AI Technical Summary
The existing seat tray causes noise problems because the metal central shaft rubs against the thin-walled base and bottom shell when the user leans back.
By setting bearing holes on the base and bottom shell, the connecting shaft can rotate within the bearing holes, increasing the contact area between the connecting shaft and the bottom shell and base. POM material and copper bushings are used to reduce friction and improve service life.
It reduces frictional loss between the connecting shaft and the bottom shell and base, eliminates abnormal noise, and improves the service life and connection stability of the seat tray.
Smart Images
Figure CN223958550U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seating technology, and in particular to a seating tray and a seat. Background Technology
[0002] Seat trays are used to enable functions such as tilting, raising, lowering, and locking of the seat. Existing seat trays generally consist of a thin-walled metal base connecting to the seat, and a metal central shaft connecting both the base and the bottom shell. However, when the seat is tilted, the metal central shaft rubs against the thin-walled base and bottom shell, which wears down the thin-walled metal base and bottom shell, causing noise when the user leans forward or backward in the chair. Utility Model Content
[0003] The purpose of this utility model is to provide a tray and seat for a seat, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0005] First, this utility model provides a seat tray, comprising:
[0006] The base has a first connecting shaft hole;
[0007] A bottom shell, located below the base, is provided with a second connecting shaft hole, which is coaxial with the first connecting shaft hole;
[0008] A connecting shaft passes through both the first connecting shaft hole and the second connecting shaft hole to connect the base and the bottom shell together;
[0009] The first bearing seat has a bearing seat hole, which is coaxial with the first connecting shaft hole and is directly fitted onto the outer circumference of the connecting shaft. The first bearing seat is connected to the base and / or the bottom shell.
[0010] It should be noted that the bearing seat hole described here, which is directly fitted onto the outer circumference of the connecting shaft, means that the bearing seat hole is fitted outside the connecting shaft, and the connecting shaft can rotate within the bearing seat hole. The bearing seat hole serves to maintain the radial position of the connecting shaft. The bearing seat hole can be formed by directly machining a hole on the first bearing seat and then fitting it onto the connecting shaft, or it can be formed by first forming a hole and then providing an auxiliary component such as a bearing sleeve inside the hole. In the latter case, the auxiliary component and the original hole should also be considered as the bearing seat hole of this utility model.
[0011] Since the base and the bottom shell are usually thin-walled components, the connecting shaft often rubs against the first or second connecting shaft hole when the user leans back in the chair, causing abnormal noise. However, by setting the first bearing seat, whose bearing seat hole directly fits onto the outer circumference of the connecting shaft, the part of the seat tray that contacts the hole shaft of the connecting shaft is thickened. Therefore, the friction between the connecting shaft and the bottom shell and / or the base can be distributed, reducing the frictional loss of the contact pair and alleviating or even eliminating the abnormal noise.
[0012] The first bearing can be disposed on the base alone, on the bottom shell alone, or on both the bottom shell and the base.
[0013] As an extension of the above solution, the first bearing is disposed on the inner wall of the bottom shell and the outer wall of the base. Based on the above solution, since the bottom shell is generally partially fitted into the first groove of the base, a gap is needed between the outer wall of the bottom shell and the inner wall of the first groove to allow the base to rotate relative to the bottom shell without causing friction due to an excessively small gap. However, the gap cannot be too large, otherwise it will increase the overall size of the seat tray and increase the risk of affecting the connection stability. Therefore, by simultaneously providing the first bearing on the inner wall of the bottom shell and the outer wall of the base, the gap between the side wall of the base and the side wall of the bottom shell can be reduced while ensuring smooth rotation of the base relative to the bottom shell. This results in a smaller size for the seat tray and avoids other situations that may affect the connection stability between the bottom shell and the base.
[0014] As an extension of the above solution, a first bushing is also connected to the bottom shell. The first bushing is coaxially connected to the connecting shaft, penetrates the outer wall of the bottom shell, and extends towards the first bearing seat. Since the bottom shell mainly bears the user's weight during normal operation, by fitting the first bushing onto the outer wall of the bottom shell and extending it towards the inner wall of the bottom shell, the friction between the connecting shaft and the first bearing seat can be transformed into friction between the connecting seat and the first bushing, thereby improving the service life of the first bearing seat, while reducing the gap between the side wall of the base and the side wall of the bottom shell.
[0015] As an extension of the above solution, the bottom shell and / or the base are further provided with a second bearing seat, which is connected to the lifting adjustment rod.
[0016] Since the seat's height adjustment lever needs to be pulled out or rotated during use, the lever also exerts pressure on the base and the bottom shell when rotated. Therefore, by providing a second bearing on the bottom shell and / or the base, compared to previous technologies, the contact area between the height adjustment lever and the base and / or the bottom shell can be increased, thereby increasing the service life of the bottom shell and / or the base.
[0017] As an extension of the above solution, the second bearing is disposed on the inner wall of the bottom shell and the outer wall of the base. By simultaneously providing the second bearing on the inner wall of the bottom shell and the outer wall of the base, the gap between the side wall of the base and the side wall of the bottom shell can be reduced, resulting in a smaller size for the seat tray and preventing other situations from affecting the connection stability between the bottom shell and the base.
[0018] As an extension of the above solution, the second bearing seat is connected to a second bushing, the second bushing passing through the second bearing seat, and the lifting adjustment rod is coaxially connected to the second bushing. By connecting the second bushing to the second bearing seat, direct contact between the lifting adjustment rod and the second bearing seat is avoided, which can improve the service life of the second bearing seat and further enhance the service life of the base and the bottom shell.
[0019] As an extension of the above solution, the base is provided with a first mounting hole, and the inner wall of the first mounting hole is provided with a first protrusion.
[0020] On the other hand, by providing the first protrusion, the first protrusion can be positioned when the base and the seat are connected with screws, so that the screws will not be misaligned and damage to the base and the seat can be avoided.
[0021] As an extension of the above solution, the first bushing is made of POM material. Since the first bushing and the connecting shaft experience frequent friction, using POM material provides better wear resistance. POM refers to polyoxymethylene, a commonly used high-performance thermoplastic engineering plastic with excellent mechanical strength, wear resistance, fatigue resistance, and dimensional stability.
[0022] As an extension of the above solution, the second bushing is a copper bushing. Since the lifting adjustment rod needs to be rotated and moved laterally, using a copper bushing as the second bushing ensures that the lifting adjustment rod can be rotated and moved laterally smoothly.
[0023] Based on the above solutions, this utility model also provides a seat, which includes any of the seat trays provided by this utility model and any of its extensions. The seat also includes a seat, a lifting rod, and a seat chassis. The seat tray is located below the seat, the base is connected to the seat, the seat chassis is located below the seat tray, and the lifting rod connects the seat tray to the seat chassis.
[0024] Since the seat provided in this solution uses the seat tray from the above-mentioned solution, the seat in this solution has all the beneficial effects of the above-mentioned solution. Attached Figure Description
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0026] Figure 1 This is a schematic diagram of the overall structure of the seat tray provided by this utility model;
[0027] Figure 2 This is a schematic diagram of the base of the seat tray provided by this utility model;
[0028] Figure 3 This is a schematic diagram of the bottom shell of the seat tray provided by this utility model;
[0029] Figure 4 This is a schematic diagram of the bottom shell of the seat tray provided by this utility model;
[0030] Figure 5 This is a schematic diagram of the bottom shell of the seat tray provided by this utility model;
[0031] Figure 6 yes Figure 2 A magnified view of part A in the image;
[0032] Figure 7 This is a schematic diagram of the seat provided by this utility model.
[0033] In the attached drawings: 1. Seat tray provided by this utility model; 100. Base; 101. First mounting hole; 102. First protrusion; 103. Adjusting handwheel; 104. T-screw; 105. Spring; 106. Second mounting hole; 107. First groove; 108. Third mounting hole; 109. First connecting shaft hole; 200. Bottom shell; 201. Adjusting handwheel mounting hole; 202. Second connecting shaft hole; 300. Connecting shaft; 400. First bearing seat; 401. First bushing; 402. Step hole; 403. Bearing seat hole; 500. Second bearing seat; 501. Second bushing; 600. Lifting adjustment rod; 700. Seat; 800. Lifting rod; 900. Seat chassis. Detailed Implementation
[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0036] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.
[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0038] Reference Figures 1 to 5 The following are several embodiments of the seat tray and seat of this utility model.
[0039] like Figures 1 to 4 As shown, in some embodiments, a seat tray 1 includes:
[0040] The base 100 is provided with a first connecting shaft hole 109, a first groove 107 and a third mounting hole 108, and the base 100 is used to connect the chair seat 700.
[0041] The bottom shell 200 is located below the base 100. The bottom shell 200 is provided with a second connecting shaft hole 202, a second mounting hole 106, and an adjusting handwheel mounting hole 201. The second connecting shaft hole 202 is coaxial with the first connecting shaft hole 109. The second mounting hole 106 is used to connect the lifting rod 800.
[0042] A connecting shaft 300 passes through both the first connecting shaft hole 109 and the second connecting shaft hole 202, connecting the base 100 and the bottom shell 200 together.
[0043] The first bearing seat 400 has a bearing seat hole 403, which is coaxial with the first connecting shaft hole 109, and the bearing seat hole 403 is directly fitted onto the outer periphery of the connecting shaft 300. The first bearing seat 400 is connected to the base 100 and / or the bottom shell 200.
[0044] The first bearing seat 400 can be disposed on the base 100 alone, or on the bottom shell 200 alone, or on both the base 100 and the bottom shell 200.
[0045] When the first bearing 400 is set separately on the bottom shell 200, the first bearing 400 can be set on the inner side wall of the bottom shell 200 to reduce the gap between it and the base 100, and also to facilitate the processing and production of the whole product.
[0046] When the first bearing 400 is disposed alone on the base 100, it can be disposed on the side wall outside the base 100 for ease of processing and without affecting the connection with the bottom shell 200.
[0047] To achieve the best performance, the first bearing 400 can be provided on both the inner wall of the bottom shell 200 and the outer wall of the base 100. This increases the thickness of the contact area between the connecting shaft 300 and the bottom shell 200 and the base 100, extends the service life of the seat tray 1, and prevents long-term friction from increasing the gap between the connecting shaft 300 and the bottom shell 200 and the base 100, thus avoiding abnormal noises between the bottom shell 200 and / or the base 100 and the connecting shaft 300.
[0048] The seat tray 1 also includes an adjustment handwheel 103, a spring 105, a spring sleeve, a T-screw 104, and a lifting adjustment rod 600 for adjusting the tilt angle. Since this part of the design is well known to designers in the art, it will not be described in detail here.
[0049] like Figures 2 to 5As shown, in some embodiments, the base shell 200 has a stepped hole for connecting a first bushing 401. The first bushing 401 is coaxially connected to the connecting shaft 300, and extends through the outer wall of the base shell 200 and toward the first bearing seat 400. Since the base shell 200 primarily bears the user's weight during normal operation, by fitting the first bushing 401 onto the outer wall of the base shell 200 and extending it toward the inner wall of the base shell 200, the gap between the side wall of the base 100 and the side wall of the base shell 200 can be reduced, while also increasing the service life of the first bearing seat 400. To ensure optimal strength, the first bushing 401 is made of POM material.
[0050] In some embodiments, since the seat's height adjustment lever 600 needs to be pulled out or rotated during use, the base shell 200 and / or the base 100 are also connected to a second bearing 500, which is connected to the height adjustment lever 600. Providing the second bearing 500 on the base shell 200 and / or the base 100 increases the support points for the height adjustment lever 600 and also increases the service life of the base shell 200 and / or the base 100.
[0051] The second bearing 500 can be disposed on the bottom shell 200 alone, disposed on the base 100 alone, or disposed on both the bottom shell 200 and the base 100.
[0052] In this embodiment, the second bearing seat 500 is disposed on the inner wall of the bottom shell 200 and the outer wall of the base 100. By simultaneously providing the second bearing seat 500 on the inner wall of the bottom shell 200 and the outer wall of the base 100, the gap between the side wall of the base 100 and the side wall of the bottom shell 200 can be reduced, resulting in a smaller size for the seat tray and preventing other situations from affecting the connection stability between the bottom shell 200 and the base 100.
[0053] In some embodiments, to facilitate smoother movement between the lifting adjustment rod 600 and the second bearing 500, a second bushing 501 is connected to the second bearing 500, and the lifting adjustment rod 600 and the second bushing 501 are coaxially connected. Since the lifting adjustment rod 600 needs to be both translated and rotated, a material with good lubrication properties in both the axial and radial directions is required. As the optimal method, the second bushing 501 is made of copper.
[0054] In some embodiments, to meet environmental protection requirements and to improve the corrosion resistance of the seat tray 1, composite materials can be selected to give the base 100 and / or the bottom shell 200 corresponding properties. Nylon fiberglass material has high temperature resistance, good dimensional stability, good toughness, good insulation, good corrosion resistance, and high mechanical strength, meeting the requirements. Therefore, the base 100 and / or the bottom shell 200 are made of nylon fiberglass material.
[0055] In some embodiments, to make the connection between the base 100 and the seat 700 more secure, the connection between the base 100 and the seat 700 is thickened. The base 100 is provided with a first mounting hole 101, which is located at the four corners of the base 100. The inner wall of the first mounting hole 101 is provided with a first protrusion 102. By providing the first protrusion 102, when the base 100 and the seat 700 are connected with screws, the first protrusion 102 plays a positioning role, preventing the screws from being misaligned and avoiding damage to the base 100 and the seat 700. At the same time, providing the first protrusion 102 is equivalent to providing a reinforcing rib at the connection between the first mounting hole 101 and the base 100, ensuring the connection stability between the first mounting hole 101 and the base 100.
[0056] like Figure 6 As shown, in some embodiments, the present invention also provides a seat, the seat including a seat 700, a seat chassis 900, a lifting rod 800 and a seat tray 1 provided in the above embodiments, the seat tray 1 is connected to the lifting rod 800 below, the seat 700 is connected to the seat tray 1 above, and the seat chassis 900 is connected to the lifting rod 800 below.
[0057] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A tray for a seat, characterized by: The application relates to a seat tray, which comprises the following parts: a base (100) provided with a first connecting shaft hole (109); a bottom shell (200) located below the base (100), wherein the bottom shell (200) is provided with a second connecting shaft hole (202) coaxial with the first connecting shaft hole (109); a connecting shaft (300) penetrating through the first connecting shaft hole (109) and the second connecting shaft hole (202) to connect the base (100) and the bottom shell (200) together; a first shaft seat (400) provided with a shaft seat hole (403) coaxial with the first connecting shaft hole (109) and directly sleeved on the outer wall of the connecting shaft (300), wherein the first shaft seat (400) is connected with the base (100) and / or the bottom shell (200).
2. The tray for a seat according to claim 1, characterized by: The first shaft seat (400) is arranged on the inner wall of the bottom shell (200) and the outer wall of the base (100).
3. The tray for a seat according to claim 2, characterized by: The bottom shell (200) is further provided with a first shaft sleeve (401) coaxially connected with the connecting shaft (300), wherein the first shaft sleeve (401) penetrates through the outer wall of the bottom shell (200) and extends to the first shaft seat (400).
4. The tray for a seat according to claim 1, characterized by: The bottom shell (200) and / or the base (100) are further provided with a second shaft seat (500) connected with a lifting adjusting rod (600).
5. The tray for a seat according to claim 4, characterized by: The second shaft seat (500) is arranged on the inner wall of the bottom shell (200) and the outer wall of the base (100).
6. The tray for a seat according to claim 5, characterized by: The second shaft seat (500) is connected with a second shaft sleeve (501) penetrating through the second shaft seat (500), wherein the lifting adjusting rod (600) is coaxially connected with the second shaft sleeve (501).
7. The tray for a seat according to claim 1, characterized by: The base (100) is provided with a first mounting hole (101) with a first protruding part (102) arranged on the inner wall of the first mounting hole (101).
8. The tray for a seat according to claim 3, characterized by: The first shaft sleeve (401) is made of POM material.
9. The tray for a seat according to claim 6, characterized by: The second shaft sleeve (501) is a copper sleeve.
10. A seat, characterized by: The application further relates to a seat tray, a seat base (700) and a lifting rod (800), and a seat chassis (900), wherein the seat tray is arranged below the seat base (700), the base (100) is connected with the seat base (700), the seat chassis (900) is located below the seat tray, and the lifting rod (800) connects the seat tray and the seat chassis (900) together.