Rotary swing arm type seat fixing device with sliding protection component
By designing a rotating swing arm type seat fixing device with sliding protective components, the problems of inconvenience in moving desks and chairs in the classroom and difficulty in cleaning are solved, achieving noise reduction and safety improvement, and preventing pinching and accumulation of pollutants.
Patent Information
- Application Number
- CN202422962025.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The existing fixed desks and chairs in classrooms make it inconvenient for students to enter and exit, difficult to clean, and pose noise pollution and potential dangers of getting stuck. They also easily accumulate dust and dirt.
Design a rotating swing arm type seat fixing device with sliding protective components. The swing range of the swing arm is limited by a support base, pivot mechanism and return spring, and equipped with an outer cover and flexible protective cover to reduce noise and prevent pinching.
It facilitates student access, makes cleaning easier, reduces noise, prevents hazard trapping and pollutant accumulation, and improves safety and environmental cleanliness.
Smart Images
Figure CN223585466U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fixed seat device, specifically, relate to a kind of rotating swing arm type seat fixing device with sliding protection component, it improves the device technology of seat forward and backward movement rotation return and limit the swing range of swing arm close to fixed seat device. BACKGROUND
[0002] At present, the fixed desk and chair of ladder classroom is transversely connected, and it is inconvenient to enter and exit. When all seats are occupied, if one person wants to leave the desk and chair, the person needs to move the seat or stand up to make way for the person to pass through. This can easily produce noise and affect other people, and it is also inconvenient to clean. In addition, some rotating seats are connected by a pivot, and the seat can pivot within a predetermined range of the swing arm support arm. The range is between the position close to the desk and the position away from the desk. However, this can produce a potential dangerous pinch point that can hook loose clothing or paper. As the device components are used in the classroom space or other areas, the materials start to wear, the joints loosen, and the pinch point becomes more obvious, thereby causing danger to fingers, clothing, books, and the like. In addition, since this area is still exposed, it is also easy to accumulate dust, dirt, and other pollutants.
[0003] At present, there is no solution to the above technical problems in the market. SUMMARY
[0004] To solve the above problems, the utility model provides a rotating swing arm type seat fixing device with a sliding protection component, which can overcome the above shortcomings of the prior art. The utility model is dedicated to solving the problem that students in the classroom have difficulty entering and exiting the desk and chair, and it is difficult to clean. It is helpful to facilitate way-making, easy to clean, reduce environmental noise, and design a protection component for the pivot connection of the swing arm seat device. In view of the above situation, one object of the utility model is to provide a protection cover to limit the pinch point close to the swing arm assembly. Another object is to provide a pivot mechanism to facilitate easy seating, easy cleaning, and reduce environmental noise in a maximum range.
[0005] To achieve the above technical purposes, the technical scheme of the utility model is as follows:
[0006] A fixed seat device with a swing arm rotating return mechanism and a sliding protection component includes a support base, two swing arms are arranged on the two sides of the support base, one end of each swing arm is connected to the support base, the other end of each swing arm extends outward and is provided with a seat rotating mechanism, and a desktop support arm is connected to the top end of the support base.
[0007] The support base includes a base shell and a flange base. The base shell is in the shape of a ring and surrounds the flange base. The flange base is fixedly arranged on the ground. A pivot support is arranged on the flange base, and a U-shaped piece is fixedly connected to the top of the pivot support.
[0008] The U-shaped member is symmetrical left and right as a whole, and the U-shaped member comprises side plates, and the top end and bottom end of the front side surface of the side plates are respectively connected with a top plate and a bottom plate; the two sides of the top plate and the bottom plate are respectively provided with a pivot hole;
[0009] The front end of the top plate and the front end of the bottom plate are fixedly connected with a trapezoidal disc, and the opposite ends of the trapezoidal disc and the side plates are respectively provided with a swing arm front bumper and a swing arm rear bumper; the swing arm front bumper and the swing arm rear bumper on the same side limit the swing range of the swing arm on the same side;
[0010] The swing arm front bumper and the swing arm rear bumper on the same side are provided with a pivot mechanism, the pivot mechanism comprises a pivot bolt, the pivot bolt is rotatably connected with a swing arm round pipe, the swing arm round pipe is sleeved on the pivot bolt, the pivot bolt penetrates the swing arm round pipe and two pivot holes on the same side in vertical alignment from top to bottom, one end of the swing arm round pipe is fixedly connected with the swing arm on the same side, and the swing arm on the same side is rotatably connected with the support base through the pivot mechanism; the trapezoidal disc and the swing arm round pipes on the two sides are respectively connected with a swing arm return spring.
[0011] In implementation, the two sides in the present application have no specific orientation limitation, which refers to the left and right sides in the main view. The top end of the seat rotating mechanism is provided with a seat, and the top end of the desktop support arm is provided with a table; when stationary, the swing arms on the two sides are respectively rested on the swing arm rear bumpers on the same side; when the swing arms are pulled apart, force is applied to the swing arm return springs connected therewith, the swing arm return springs are thus elongated, so that the swing arms receive a return force, at this time, the swing arms continue to swing backward to the upper limit value of the swing range and touch the swing arm front bumpers to generate a buffering force to reduce noise, at this time, the pulling force on the swing arms is released, the swing arms will return to the initial position through the return function of the swing arm return springs, and touching the swing arm rear bumpers will slow down the noise during return, so that noiseless use and passage space are provided.
[0012] Preferably, the support base is externally provided with an outer cover, the two sides of the outer cover are respectively provided with side openings for the swing arms to pass through and reciprocally swing, and the top of the outer cover is provided with a top opening for the desktop support arm to pass through.
[0013] Preferably, the outer cover comprises two half covers of the same specification and detachably connected, and the half cover comprises side wall one and side wall two connected.
[0014] Preferably, the top of the U-shaped member is provided with a cover support bracket for supporting the two half covers. The cover support bracket can be detachably connected, buckled connected or in other ways with the two half covers to achieve support, or can be in a contact relationship without direct connection, as long as it can support the whole outer cover. The cover support bracket can be provided with an opening for the pivot bolt to pass through and be fixed on the top of the U-shaped member through the pivot bolt, of course, it can also be fixed on the top of the U-shaped member through other ways.
[0015] Preferably, the upper part of the first sidewall is provided with an upper protrusion, and the upper part of the second sidewall is provided with an upper retaining flange corresponding to the upper protrusion; the lower part of the first sidewall is provided with a lower protrusion, and the lower part of the second sidewall is provided with a lower retaining flange corresponding to the lower protrusion. When the two half covers are connected, the upper protrusion and the lower protrusion of one half cover are respectively connected with the upper retaining flange and the lower retaining flange of the other half cover, so as to realize the detachable connection of the two half covers into a complete outer cover.
[0016] Preferably, the top of the U-shaped piece is provided with a cover support bracket for supporting the two half covers. The cover support bracket can be detachably connected, buckled, or the like with the two half covers, or can be in a contact relationship without direct connection, as long as it can support the whole outer cover.
[0017] Preferably, the lower part of the first sidewall and the lower part of the second sidewall are respectively provided with a groove one, and the upper part of the first sidewall and the upper part of the second sidewall are respectively provided with a groove two, and the adjacent groove one and groove two are respectively located at the upper and lower edges of the same side opening.
[0018] The flexible outer cover is sleeved with a flexible outer cover at one end of the swing arm, the flexible outer cover is provided with a circular opening for the swing arm to pass through, and the lower part of the flexible outer cover is provided with a bottom groove in communication with the circular opening.
[0019] The bottom edge and the top edge of the flexible outer cover are respectively connected with the groove one and the groove two, so as to realize the reciprocating movement of the flexible outer cover relative to the outer cover with the reciprocating swing of the swing arm.
[0020] Preferably, the flexible outer cover is preferably located in the space enclosed by the outer cover.
[0021] Preferably, the length of the side opening is slightly greater than the distance between the two limit positions of the reciprocating swing of the swing arm.
[0022] Preferably, the width of the side opening is greater than the diameter of the circular opening (i.e. greater than the diameter of the swing arm or the distance between the upper and lower edges).
[0023] Preferably, the length of the groove one and the groove two is the same and slightly greater than the length of the side opening.
[0024] Preferably, the middle part of the flange base is provided with an opening, the lower part of the pivot bracket passes through the opening downward, and the upper part of the pivot bracket is fixedly connected with the flange base.
[0025] Preferably, the circular pipe of the swing arm is provided with an upper pipe sleeve and a lower pipe sleeve, and the upper pipe sleeve and the lower pipe sleeve are respectively threadedly connected with the pivot bolt.
[0026] Preferably, the trapezoidal disc includes an inner side slope, and the two sides of the inner side slope are symmetrically provided with inclined side surfaces, the rear end of the inclined side surface is buckled with the front bumper of the swing arm, and the front end of the side plate is buckled with the rear bumper of the swing arm.
[0027] In an embodiment, the inner side slope surface is provided with a row of vertically distributed swing arm reset holes one on each of the left and right sides, the swing arm round pipe is provided with corresponding swing arm reset holes two, the swing arm reset spring is connected to the corresponding swing arm reset holes one and swing arm reset holes two at both ends, and the corresponding swing arm reset holes one and swing arm reset holes two are located on the same side or different sides. That is, when the corresponding swing arm reset holes one and swing arm reset holes two are on the same side, one swing arm reset hole one on the left side is matched with the swing arm reset hole two on the left side, and one swing arm reset hole one on the right side is matched with the swing arm reset hole two on the right side; when the corresponding swing arm reset holes one and swing arm reset holes two are on different sides, one swing arm reset hole one on the left side is matched with the swing arm reset hole two on the right side, and one swing arm reset hole one on the right side is matched with the swing arm reset hole two on the left side.
[0028] In an embodiment, the corresponding swing arm reset holes one and swing arm reset holes two are preferably located on different sides (as shown in Figure 4 , so that the reset effect after swing is better.
[0029] In an embodiment, one end of the swing arm reset spring 19 can pass through the trapezoidal disc 110 and be connected to the corresponding swing arm reset hole two 18c. The trapezoidal disc 110 can be provided with a spring through opening 110e for the swing arm reset spring 19 to pass through, or other ways can be adopted as long as the connection of one end of the swing arm reset spring 19 to the swing arm reset hole two 18c is not hindered by other components such as the trapezoidal disc 110, the U-shaped piece 14, and the bumper.
[0030] In an embodiment, the swing arm reset spring 19 is located at the back side of the inner side slope surface 110a, and the two ends are connected to the corresponding swing arm reset hole one 110c and swing arm reset hole two 18c respectively. The swing arm reset spring 19 is located in the space between the inner side slope surface 110a and the side plate 14b.
[0031] Preferably, each row of vertically distributed swing arm reset holes one is 1-5.
[0032] Preferably, the slope side surface is provided with a clamping hole one corresponding to the swing arm front bumper, the swing arm front bumper is provided with a protrusion one corresponding to the slope side surface, and the slope side surface and the swing arm front bumper are connected through the corresponding clamping hole one and protrusion one; similarly, the side plate is provided with a clamping hole two corresponding to the swing arm rear bumper, the swing arm rear bumper is provided with a protrusion two corresponding to the side plate, and the side plate and the swing arm rear bumper are connected through the corresponding clamping hole two and protrusion two.
[0033] Preferably, the number of clamping hole one, protrusion one, clamping hole two, and protrusion two is preferably 3, which can be determined according to actual needs.
[0034] Preferably, the seat rotating mechanism includes a seat support bolt and a seat rotating round pipe.
[0035] The top of the seat rotating pipe is provided with a cam mechanism for connecting the seat, and the bottom is provided with a bottom bushing; the cam mechanism comprises an upper cam and a lower cam which cooperate with each other; the bottom of the bottom bushing is provided with a guard ring;
[0036] The seat supporting bolt passes through the seat rotating pipe from top to bottom, and the top end and the bottom end of the seat supporting bolt are threadedly connected with the lower cam and the bottom bushing respectively;
[0037] A plastic bearing is arranged below the cam mechanism, a compression spring is arranged below the plastic bearing, the bottom of the compression spring is in close contact with the bottom bushing, and a gasket is arranged between the plastic bearing and the lower cam and the compression spring respectively;
[0038] The gasket, the plastic bearing and the compression spring are all penetrated by the seat supporting bolt and located in the seat rotating pipe.
[0039] Preferably, the top end of the desktop supporting arm is provided with a desktop bottom flange for connecting the desktop.
[0040] Preferably, the upper limit value of the swing range of the swing arm is determined according to actual needs, preferably between 20° and 80°, and the best value range is about 45°. The upper limit value of the swing range is the maximum included angle value of the same side swing arm between the front bumper and the rear bumper of the same side swing arm, or the supplementary angle value of the included angle between the slope side surface and the inner side slope surface.
[0041] The product has the advantages of simple structure and convenient operation. The utility model solves the problems that students are inconvenient to enter and exit and difficult to clean the desks and chairs in the classroom, and is helpful for convenient yielding, easy cleaning, reducing environmental noise, limiting the clamping point of the swing arm mechanism, preventing fingers, clothes, paper and other articles from being clamped, and preventing the clamping point area from being exposed to generate dust, stains and other pollutants. BRIEF DESCRIPTION OF DRAWINGS
[0042] The utility model will be further described in detail below according to the drawings.
[0043] Figure 1 It is a perspective view of the swing arm rotating and returning mechanism device.
[0044] Figure 2 It is an exploded view of the swing arm rotating and returning mechanism device.
[0045] Figure 3 It is Figure 2 the exploded view of the support base.
[0046] Figure 4 It is a front view of the support base and the swing arm.
[0047] Figure 5 It is an exploded view of the seat rotating mechanism.
[0048] Figure 6 is the bottom view of the application scenario of the swingable arm rotary return mechanism device.
[0049] Figure 7 is the perspective view of the application scenario of the swingable arm rotary return mechanism device.
[0050] Figure 8 is the matching schematic view of the pivot mechanism and the swing arm position.
[0051] Figures 9-11 is the multi-detail display view of the rotary swing arm type seat fixing device in the state change. DETAILED DESCRIPTION
[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.
[0053] As Figures 1-11 shown, in order to facilitate the understanding of the above technical solutions of the present application, the above technical solutions of the present application will be described in detail below through specific use modes.
[0054] The rotary swing arm type seat fixing device with a sliding protection member, comprising a support base 10, both sides of the support base 10 are respectively provided with a swing arm 30, one end of the swing arm 30 is connected with the support base 10, the other end of the swing arm 30 extends outward and is provided with a seat rotating mechanism 50, and the top end of the support base 10 is connected with a desktop support arm 40.
[0055] The support base 10 comprises a base shell 11 and a flange base 12, the base shell 11 is annular and surrounds the flange base 12, the flange base 12 is fixedly arranged on the ground, the flange base 12 is provided with a pivot support 13, and the top of the pivot support 13 is fixedly connected with a U-shaped piece 14.
[0056] The U-shaped piece 14 is symmetrical left and right as a whole, the U-shaped piece 14 comprises a side plate 14b, and the top end and the bottom end of the front side of the side plate 14b are respectively connected with a top plate 14a and a bottom plate 14c; the two sides of the top plate 14a and the bottom plate 14c are respectively provided with pivot rotating holes 14d.
[0057] The top plate 14a and the bottom plate 14c are fixedly connected with a trapezoidal disc 110 between the front ends of the top plate 14a and the bottom plate 14c, and the opposite ends of the trapezoidal disc 110 and the side plate 14b are respectively and symmetrically provided with a swing arm front bumper 15 and a swing arm rear bumper 16; the swing arm front bumper 15 and the swing arm rear bumper 16 on the same side limit the swing range of the swing arm 30 on the same side.
[0058] The pivot mechanism is provided between the same side swing arm front bumper 15 and the swing arm rear bumper 16, and includes a pivot bolt 17, the swing arm round pipe 18 is rotatably connected to the pivot bolt 17, the pivot bolt 17 penetrates the swing arm round pipe 18 and the two pivot holes 14d vertically aligned on the same side from top to bottom, the swing arm round pipe 18 is fixedly connected to one end of the swing arm 30 on the same side, and the swing arm 30 is rotatably connected to the support base 10 through the pivot mechanism; the trapezoidal disc 110 is connected with the swing arm return spring 19 between the two swing arm round pipes 18.
[0059] In the implementation, the two sides in the application without specific orientation limitation refer to the left and right sides in the main view. The seat rotating mechanism 50 is provided with a seat 80 at the top end, and the desktop support arm 40 is provided with a table 70 at the top end; when stationary, the two swing arms 30 are respectively rested on the swing arm rear bumper 16 on the same side; when the swing arm 30 is pulled apart, a force is applied to the swing arm return spring 19 connected thereto, the swing arm return spring 19 is thus elongated, so that the swing arm 30 receives a return force, at this time, the swing arm 30 continues to swing backward to the upper limit of the swing range and touches the swing arm front bumper 15 to generate a buffering force to reduce noise, at this time, the pulling force on the swing arm 30 is released, the swing arm 30 returns to the initial position through the return function of the swing arm return spring 19, and the swing arm rear bumper 16 is touched to slow down the noise during return, so that noiseless use and passage space are provided.
[0060] In some embodiments, the support base 10 is externally provided with an outer cover 20, the outer cover 20 is provided with a side opening 21 on both sides for the swing arm 30 to pass through and reciprocating swing, and the outer cover 20 is provided with a top opening 22 at the top for the desktop support arm 40 to pass through.
[0061] In some embodiments, the outer cover 20 includes two half covers 23 of the same size and detachable connection, and the half cover 23 includes a side wall one 23a and a side wall two 23b connected.
[0062] In some embodiments, the U-shaped member 14 is provided with a cover support bracket 111 for supporting the two half covers 23. The cover support bracket 111 can be detachably connected, buckled, or the like with the two half covers 23 to achieve support, or can be in a contact relationship without direct connection, as long as it can support the whole outer cover 20. The cover support bracket 111 can be provided with an opening through which the pivot bolt 17 penetrates, and is fixed to the top of the U-shaped member 14 through the pivot bolt 17, of course, it can also be fixed to the top of the U-shaped member 14 through other ways.
[0063] In some embodiments, the upper portion of the first side wall 23a is provided with an upper protrusion 26a, and the upper portion of the second side wall 23b is provided with an upper retaining flange 26b corresponding to the upper protrusion 26a; the lower portion of the first side wall 23a is provided with a lower protrusion 24a, and the lower portion of the second side wall 23b is provided with a lower retaining flange 24b corresponding to the lower protrusion 24a. When the two half covers 23 are connected, the upper protrusion 26a and the lower protrusion 24a of one half cover 23 are respectively engaged with the upper retaining flange 26b and the lower retaining flange 24b of the other half cover 23, so as to realize the detachable connection of the two half covers 23 into a complete outer cover 20.
[0064] In some embodiments, the lower portion of the first side wall 23a and the lower portion of the second side wall 23b are respectively provided with a groove 25a, and the upper portion of the first side wall 23a and the upper portion of the second side wall 23b are respectively provided with a groove 25b; the adjacent grooves 25a and 25b are respectively located at the upper and lower edges of the same side opening 21.
[0065] The flexible outer protection cover 60 is sleeved with the swing arm 30 at one end, and is provided with a circular opening 61 for the swing arm 30 to pass through. The lower portion of the flexible outer protection cover 60 is provided with a bottom groove 62, which is in communication with the circular opening 61.
[0066] The bottom edge and the top edge of the flexible outer protection cover 60 are respectively slidably connected with the grooves 25a and 25b, so as to realize the reciprocating movement of the flexible outer protection cover 60 relative to the outer cover 20 along with the reciprocating swing of the swing arm 30.
[0067] In some embodiments, the flexible outer protection cover 60 is preferably located in the space enclosed by the outer cover 20.
[0068] In some embodiments, the length of the side opening 21 is slightly greater than the distance between the two limit positions of the reciprocating swing of the swing arm 30.
[0069] In some embodiments, the width of the side opening 21 is greater than the diameter of the circular opening 61 (i.e. greater than the diameter of the swing arm 30 or the distance between the upper and lower edges).
[0070] In some embodiments, the lengths of the grooves 25a and 25b are the same and slightly greater than the length of the side opening 21.
[0071] In some embodiments, the middle portion of the flange base 12 is provided with a hollow 12a, and the lower portion of the pivot bracket 13 passes through the hollow 12a downwardly, and the upper portion of the pivot bracket 13 is fixedly connected with the flange base 12.
[0072] In some embodiments, the swing arm circular pipe 18 is provided with an upper pipe sleeve 18a and a lower pipe sleeve 18b, and the upper pipe sleeve 18a and the lower pipe sleeve 18b are respectively threadedly connected with the pivot bolt 17.
[0073] In some embodiments, the trapezoidal disc 110 comprises an inner slope surface 110a, and two slope side surfaces 110b symmetrically arranged on both sides of the inner slope surface 110a. The rear end of the slope side surface 110b is connected to the front bumper 15 of the swing arm, and the front end of the side plate 14b is connected to the rear bumper 16 of the swing arm.
[0074] In some embodiments, the inner slope surface 110a is provided with a row of vertically distributed swing arm reset holes one 110c on both sides, and the swing arm round pipe 18 is provided with corresponding swing arm reset holes two 18c. The two ends of the swing arm reset spring 19 are respectively connected to the corresponding swing arm reset holes one 110c and the swing arm reset holes two 18c. The corresponding swing arm reset holes one 110c and the swing arm reset holes two 18c are located on the same side or on different sides. That is, when the corresponding swing arm reset holes one 110c and the swing arm reset holes two 18c are on the same side, one swing arm reset hole one 110c on the left side is matched with the swing arm reset hole two 18c on the left side, and one swing arm reset hole one 110c on the right side is matched with the swing arm reset hole two 18c on the right side. When the corresponding swing arm reset holes one 110c and the swing arm reset holes two 18c are on different sides, one swing arm reset hole one 110c on the left side is matched with the swing arm reset hole two 18c on the right side, and one swing arm reset hole one 110c on the right side is matched with the swing arm reset hole two 18c on the left side.
[0075] In some embodiments, the corresponding swing arm reset holes one 110c and the swing arm reset holes two 18c are preferably located on different sides (as shown in FIG. 6), so that the reset effect of the swing arm 30 after swinging is better. Figure 4
[0076] In some embodiments, one end of the swing arm reset spring 19 can pass through the trapezoidal disc 110 and be connected to the corresponding swing arm reset hole two 18c. The trapezoidal disc 110 can be provided with a spring through hole 110e for the swing arm reset spring 19 to pass through, or other ways can be adopted as long as the connection of one end of the swing arm reset spring 19 to the swing arm reset hole two 18c is not hindered by other parts such as the trapezoidal disc 110, the U-shaped piece 14, and the bumper.
[0077] In some embodiments, the swing arm reset spring 19 is located on the rear side of the inner slope surface 110a, and the two ends thereof are respectively connected to the corresponding swing arm reset hole one 110c and the swing arm reset hole two 18c. The swing arm reset spring 19 is located in the space between the inner slope surface 110a and the side plate 14b.
[0078] In some embodiments, each row of vertically distributed swing arm reset holes one 110c is preferably 1-5.
[0079] In some embodiments, the slope side 110b is provided with a clamping hole I 110d corresponding to the swing arm front bumper 15, and the swing arm front bumper 15 is provided with a protrusion I 15a corresponding to the slope side 110b, and the slope side 110b and the swing arm front bumper 15 are connected by the clamping hole I 110d and the protrusion I 15a. Similarly, the side plate 14b is provided with a clamping hole II 14e corresponding to the swing arm rear bumper 16, and the swing arm rear bumper 16 is provided with a protrusion II 16a corresponding to the side plate 14b, and the side plate 14b and the swing arm rear bumper 16 are connected by the clamping hole II 14e and the protrusion II 16a.
[0080] In some embodiments, the number of clamping hole I 110d, protrusion I 15a, clamping hole II 14e, and protrusion II 16a is preferably three, which can be adjusted according to actual needs.
[0081] In some embodiments, the seat rotating mechanism 50 includes a seat support bolt 56 and a seat rotating circular tube 57.
[0082] The top of the seat rotating circular tube 57 is provided with a cam mechanism for connecting the seat 80, and the bottom is provided with a bottom bushing 58. The cam mechanism includes an upper cam 51 and a lower cam 52 that cooperate with each other. The bottom of the bottom bushing 58 is provided with a retainer ring 59.
[0083] The seat support bolt 56 passes through the seat rotating circular tube 57 from top to bottom, and the top and bottom ends of the seat support bolt 56 are threadedly connected with the lower cam 52 and the bottom bushing 58, respectively.
[0084] A plastic bearing 54 is arranged below the cam mechanism, and a compression spring 55 is arranged below the plastic bearing 54. The bottom of the compression spring 55 is in close contact with the bottom bushing 58. A gasket 53 is arranged between the plastic bearing 54 and the lower cam 52 and the compression spring 55, respectively.
[0085] The gasket 53, the plastic bearing 54, and the compression spring 55 are all penetrated by the seat support bolt 56 and located in the seat rotating circular tube 57.
[0086] In some embodiments, the top end of the desktop support arm 40 is provided with a table bottom flange 41 for connecting the table 70.
[0087] In some embodiments, the upper limit value of the swing range of the swing arm 30 can be adjusted according to actual needs, and is preferably between 20° and 80°, and the best value is about 45°. The upper limit value of the swing range is the maximum included angle value of the same side swing arm 30 that can reciprocate between the same side swing arm front bumper 15 and the swing arm rear bumper 16, or the supplementary angle value of the included angle between the slope side 110b and the inner side slope 110a.
[0088] In some embodiments, the upper limit value of the swing range of the swing arm 30 can be preferably 40°±10°.
[0089] In conclusion, the product adopts the unique design, the product is simple in structure, convenient to operate, the utility model wants to solve is that the student uses the desk and chair inconveniently in the classroom and the problem of difficult cleaning, it is helpful to conveniently make way, easy to clean, reduce environmental noise, limit the clamping point of the swing arm mechanism, prevent clamping fingers, clothes, paper and other articles, prevent the exposure of the clamping point area and the pollution of dust, stains and other pollutants.
[0090] In the description of the utility model, it is understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
Claims
1. A rotary swing-arm type seat fixation device with a sliding guard member, characterized by, Including support base (10), both sides of support base (10) are respectively equipped with swing arm (30), one end of swing arm (30) is connected with support base (10), the other end of swing arm (30) extends outward and is equipped with seat rotating mechanism (50), the top of support base (10) is connected with desktop support arm (40); The support base (10) includes a base shell (11) and a flange base (12), the base shell (11) is annular and surrounds the flange base (12), the flange base (12) is fixedly arranged on the ground, the flange base (12) is provided with a pivot support (13), and the top of the pivot support (13) is fixedly connected with a U-shaped piece (14); The U-shaped piece (14) is left-right symmetrical as a whole, and the U-shaped piece (14) includes a side plate (14b), the top end and the bottom end of the front side of the side plate (14b) are respectively connected with a top plate (14a) and a bottom plate (14c); the two sides of the top plate (14a) and the bottom plate (14c) are respectively provided with pivot holes (14d); The top plate (14a) and the bottom plate (14c) are fixedly connected with a trapezoidal disc (110) between the front ends thereof, and the opposite ends of the trapezoidal disc (110) and the side plate (14b) are respectively provided with a swing arm front bumper (15) and a swing arm rear bumper (16) symmetrically; the swing arm front bumper (15) and the swing arm rear bumper (16) on the same side limit the swing range of the swing arm (30) on the same side. The swing arm front bumper (15) and the swing arm rear bumper (16) on the same side are provided with a pivot mechanism, the pivot mechanism includes a pivot bolt (17), the pivot bolt (17) is rotatably connected with a swing arm round pipe (18), the swing arm round pipe (18) is sleeved on the pivot bolt (17), the pivot bolt (17) penetrates the swing arm round pipe (18) and two pivot holes (14d) on the same side vertically aligned from top to bottom, one end of the swing arm round pipe (18) is fixedly connected with the swing arm (30) on the same side, and one end of the swing arm (30) is rotatably connected with the support base (10) through the pivot mechanism; the trapezoidal disc (110) is connected with the swing arm round pipes (18) on both sides through the swing arm return springs (19) respectively. In implementation, the top end of the seat rotating mechanism (50) is provided with a seat (80), and the top end of the desktop support arm (40) is provided with a table (70); when stationary, the swing arms (30) on both sides are respectively rested on the swing arm rear bumpers (16) on the same side; when the swing arms (30) are pulled apart, the swing arms (30) first touch the swing arm front bumpers (15) and then touch the swing arm rear bumpers (16) under the action of the swing arm return springs (19).
2. The rotary swing arm chair fixture of claim 1, wherein, The support base (10) is externally provided with an outer cover (20), the two sides of the outer cover (20) are respectively provided with side openings (21) for the swing arms (30) to pass through and reciprocally swing, and the top of the outer cover (20) is provided with a top opening (22) for the desktop support arm (40) to pass through.
3. The rotary swing arm chair securement apparatus of claim 2, wherein, The outer cover (20) comprises two half covers (23) of the same size and detachable connection, the half covers (23) comprising connected side wall one (23a) and side wall two (23b); The top of the U-shaped piece (14) is provided with a cover support bracket (111) for supporting the two half covers (23); The upper part of the side wall one (23a) is provided with an upper protrusion (26a), and the upper part of the side wall two (23b) is provided with an upper retaining flange (26b) corresponding to the upper protrusion (26a); the lower part of the side wall one (23a) is provided with a lower protrusion (24a), and the lower part of the side wall two (23b) is provided with a lower retaining flange (24b) corresponding to the lower protrusion (24a); When the two half covers (23) are connected, the upper protrusion (26a) and the lower protrusion (24a) of one half cover (23) are respectively engaged with the upper retaining flange (26b) and the lower retaining flange (24b) of the other half cover (23), so that the two half covers (23) are detachably connected to form the complete outer cover (20).
4. The rotary swing arm chair fixture of claim 3, wherein, The lower part of the side wall one (23a) and the lower part of the side wall two (23b) are respectively provided with a groove one (25a) and a groove two (25b), and adjacent groove one (25a) and groove two (25b) are respectively located above and below the side opening (21) on the same side; One end of the swing arm (30) is sleeved with a flexible outer cover protection (60), the flexible outer cover protection (60) is provided with a circular opening (61) for the swing arm (30) to pass through, and the lower part of the flexible outer cover protection (60) is provided with a bottom groove (62) which is communicated with the circular opening (61); The bottom edge and the top edge of the flexible outer cover protection (60) are respectively connected with the groove one (25a) and the groove two (25b) in a sliding manner, so that the flexible outer cover protection (60) reciprocates relative to the outer cover (20) when the swing arm (30) reciprocates; The flexible outer cover protection (60) is located in the space enclosed by the outer cover (20).
5. The rotary swing arm chair securement apparatus of claim 4, wherein, The length of the side opening (21) is slightly greater than the distance between the two limit positions of the reciprocating swing of the swing arm (30), and the width of the side opening (21) is greater than the diameter of the circular opening (61); The length of the groove one (25a) and the groove two (25b) is the same and slightly greater than the length of the side opening (21).
6. The rotary swing arm chair securement apparatus of claim 1, wherein, The middle part of the flange base (12) is provided with a hollow (12a), the lower part of the pivot bracket (13) passes through the hollow (12a), and the upper part of the pivot bracket (13) is fixedly connected with the flange base (12).
7. The rotary swing arm chair securement apparatus of claim 1, wherein, The swing arm round pipe (18) is provided with an upper pipe sleeve (18a) and a lower pipe sleeve (18b), and the upper pipe sleeve (18a) and the lower pipe sleeve (18b) are respectively screwed with the pivot bolt (17).
8. The rotary swing arm chair fixture of claim 1, wherein, The trapezoidal disc (110) comprises an inner side slope (110a), which is symmetrically provided with a slope side (110b) on both sides, the rear end of the slope side (110b) is buckled with the swing arm front bumper (15), and the front end of the side plate (14b) is buckled with the swing arm rear bumper (16); The inner side slope (110a) is respectively provided with a row of vertically distributed swing arm reset holes one (110c) on the left and right sides, the swing arm round pipe (18) is provided with corresponding swing arm reset holes two (18c), and the two ends of the swing arm reset spring (19) are respectively connected with the corresponding swing arm reset holes one (110c) and swing arm reset holes two (18c). The slope side (110b) is provided with a corresponding clamping hole one (110d) matched with the swing arm front bumper (15), the swing arm front bumper (15) is provided with a corresponding protrusion one (15a) matched with the slope side (110b), and the slope side (110b) and the swing arm front bumper (15) are buckled through the corresponding clamping hole one (110d) and the protrusion one (15a). Similarly, the side plate (14b) is provided with a corresponding clamping hole two (14e) matched with the swing arm rear bumper (16), the swing arm rear bumper (16) is provided with a corresponding protrusion two (16a) matched with the side plate (14b), and the side plate (14b) and the swing arm rear bumper (16) are buckled through the corresponding clamping hole two (14e) and the protrusion two (16a).
9. The rotary swing arm chair fixture of claim 1, wherein, The seat rotating mechanism (50) comprises a seat support bolt (56) and a seat rotating round pipe (57); The seat rotating round pipe (57) is provided with a cam mechanism at the top for connecting the seat (80) and a bottom bushing (58) at the bottom; the cam mechanism comprises an upper cam (51) and a lower cam (52) matched with each other; the bottom bushing (58) is provided with a retainer ring (59) at the bottom; The seat support bolt (56) passes through the seat rotating round pipe (57) from top to bottom, and the top end and the low end of the seat support bolt (56) are respectively screwed with the lower cam (52) and the bottom bushing (58); A plastic bearing (54) is arranged below the cam mechanism, a compression spring (55) is arranged below the plastic bearing (54), the bottom of the compression spring (55) is pressed against the bottom bushing (58), and a gasket (53) is arranged between the plastic bearing (54) and the lower cam (52) and the compression spring (55) respectively; The gasket (53), the plastic bearing (54) and the compression spring (55) are all penetrated by the seat support bolt (56) and located in the seat rotating round pipe (57).
10. The rotary swing arm chair fixture of claim 1, wherein, The tabletop support arm (40) is provided with a table bottom flange (41) at the top for connecting the table (70); The upper limit value of the swing range of the swing arm (30) is 20°-80°.