Classroom chair locking structure and classroom chair

Abstract

The utility model provides a classroom chair locking structure which comprises a linear push rod device, a locking piece, a rotating shaft and a connecting piece, the rotating shaft is rotatably installed on a classroom chair body, a seat plate of a classroom chair is fixedly installed on the rotating shaft through the connecting piece, and the locking piece is fixedly installed at the tail end of a lifting rod of the linear push rod device. And a rotation stopping part matched with the locking piece is arranged on the rotating shaft, when the seat plate is in an inclined state under the action of self weight and the linear rod pushing device extends, the lifting rod pushes the locking piece to move, the locking piece is matched with the rotation stopping part, and the state of the seat plate is locked. According to the utility model, the state of the seat plate can be locked through the matching of the locking piece and the rotation stopping part, so that the problem that the turnover seat plate of the existing classroom row chair cannot be locked according to actual requirements is solved, and the classroom row chair has good practicability.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and more specifically, to a classroom chair locking structure and a classroom chair. Background Technology

[0002] In a typical classroom, the chairs are tilted when students leave, due to their own weight and / or counterweights. Figure 7 As shown, the chair seat is horizontal when the student sits down, as... Figure 8 As shown. Most classroom chairs currently on the market operate on this principle, with only minor structural differences.

[0003] Chinese utility model patent application number CN202420158411.2 discloses a tiered classroom seating arrangement, which includes several identical seat supports. A flip-up seat is provided between a group of triangular support members. A metal counterweight is detachably connected to the buckle ring through a hook. A backrest is fixedly installed on one side of each seat support, and a set of identical flip-up support components is fixedly installed on the top side of each backrest. A table is provided between a group of flip-up support components. The table automatically flips the flip-up seat by using the weight of the metal counterweight, reducing the probability of abnormal noise and damage in the future.

[0004] Although the aforementioned tiered classroom seating can automatically push and flip the flip-up seat board upwards using the weight of the metal counterweight, thus completing the folding of the flip-up seat board, it cannot lock the flip-up seat board according to actual needs, and its structure needs to be optimized. Utility Model Content

[0005] Therefore, in order to solve the problem that existing classroom chairs cannot lock the flip-up seat according to actual needs, this utility model provides a classroom chair locking structure and a classroom chair, the specific technical solution of which is as follows:

[0006] A classroom chair locking structure includes a linear actuator, a locking member, a rotating shaft, and a connecting member. The rotating shaft is rotatably mounted on the body of the classroom chair. The seat of the classroom chair is fixedly mounted on the rotating shaft via the connecting member. The locking member is fixedly mounted on the end of the lifting rod of the linear actuator. The rotating shaft is provided with an anti-rotation part that matches the locking member. When the seat is tilted under its own weight and the linear actuator extends, the lifting rod pushes the locking member to move towards the anti-rotation part. The locking member cooperates with the anti-rotation part to lock the seat.

[0007] The classroom chair locking structure, by setting a locking element at the end of the lifting rod of the linear push rod and setting an anti-rotation part on the rotating shaft that matches the locking element, can lock the seat when the seat is tilted under its own weight by cooperating with the locking element and the anti-rotation part. This solves the problem that existing classroom chairs cannot lock the flip-up seat according to actual needs, and has good practicality.

[0008] Preferably, the locking element is a locking pin, and the anti-rotation part is an anti-rotation hole. When the seat plate is tilted under its own weight, the locking pin is directly opposite the anti-rotation hole.

[0009] Preferably, the linear actuator is fixedly mounted on the wall panel of the classroom chair and located below the seat.

[0010] Preferably, the classroom chair locking structure further includes a fixing member, through which the linear push rod is fixedly installed on the wall panel.

[0011] Preferably, the fastener includes a clamp and a screw, the clamp is fixedly installed on the wall panel by the screw, and the linear push rod is located between the clamp and the wall panel.

[0012] Preferably, a shock-absorbing pad is provided on the top of the locking pin and / or inside the anti-rotation hole.

[0013] A classroom chair comprising the aforementioned classroom chair locking structure.

[0014] Preferably, the classroom chair further includes a wall panel with a groove that matches the housing of the linear actuator, and the linear actuator is installed in the groove. Attached Figure Description

[0015] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0016] Figure 1 This is a schematic diagram of the overall structure of the classroom chair locking structure in one embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structural relationship between the rotating shaft and the lifting rod in one embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the linear actuator in an embodiment of the present invention when the base plate is not locked.

[0019] Figure 4This is a schematic diagram of the structural relationship between the linear actuator and the base plate in one embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram showing the structural relationship between the locking member, the rotating shaft, and the connecting member in one embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the structural relationship between the lifting rod and the locking component in one embodiment of this utility model;

[0022] Figure 7 This is a diagram showing a regular classroom chair in an unused state.

[0023] Figure 8 This is a diagram showing a typical classroom chair with students seated.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Linear actuator; 2. Locking component; 3. Rotating shaft; 4. Connecting component; 5. Seat plate; 6. Wall panel; 7. Groove; 8. Clamp; 9. Screw; 10. Lifting rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0030] Before describing the specific embodiments of this utility model, a brief introduction to the prior art will be given first.

[0031] The rows of chairs in university classrooms consist of a seat body and a rotatable seat plate mounted on the seat body. The rotatable seat plate can automatically flip over when no one is sitting down, under its own weight and / or the weight of the counterweight, which saves space and prevents dust from accumulating on the seat plate.

[0032] When college and university students arrive at the classroom, they generally find seats freely to listen to the lecture. When there are more chairs than students, many students are unwilling to sit in the front rows, leaving those seats unused. This can inadvertently widen the distance between the teacher and students, increasing the difficulty of classroom management and affecting the quality of teaching interaction.

[0033] After searching, the applicant has not yet found a locking structure that can lock the flip-up seat of a classroom chair. The closest prior art is Chinese utility model patent application number CN202420158411.2, which discloses a tiered classroom chair. It can only use the weight of a metal counterweight to automatically push the flip-up seat upward and flip it, reducing the probability of abnormal noise and damage later. However, it cannot lock the seat while it is flipped under the weight of the counterweight. In other words, it cannot lock the chair state according to the actual situation, such as locking a certain number of seats from the back row to the front to allow students to sit in the front row as much as possible.

[0034] Therefore, it is necessary to design a classroom chair locking structure that can lock the flip-up seat board according to actual needs.

[0035] like Figure 1 and Figure 3 As shown, one embodiment of this utility model provides a classroom chair locking structure, including a linear actuator 1, a locking component 2, a rotating shaft 3, and a connecting component 4. The linear actuator 1, also known as an electric actuator or linear driver, is an electric drive device that converts the rotary motion of an electric motor into linear reciprocating motion. The electric motor, after being reduced in speed by gears or a worm gear, drives a pair of lead screw nuts. This converts the rotary motion of the motor into linear motion, and the forward and reverse rotation of the motor completes the actuator action.

[0036] The linear actuator 1 includes two transmission forms. One is a worm gear transmission form: the worm on the motor gear drives the worm wheel to rotate, causing the small lead screw inside the worm wheel to move axially. The connecting plate drives the limit rod to move axially accordingly. When the required stroke is reached, the limit block is adjusted to press down the limit switch to cut off the power, and the motor stops running (the forward and reverse control are the same). The other is a gear transmission form: the motor drives the small lead screw installed in the inner tube through the reduction gear, which drives the nut connected to it to move axially. When the set stroke is reached, the nut contact point presses down the limit switch to cut off the power, and the motor stops moving (the reverse is the same).

[0037] In this embodiment, the linear actuator 1 can be of model SKA-01, and the extension length of the lifting rod 10 ranges from 15mm to 40mm. Since the structure of the linear actuator 1 is a conventional technique in this field, it will not be described in detail here.

[0038] The rotating shaft 3 is rotatably mounted on the body of the classroom chair. Specifically, the classroom chair includes a wall panel 6, which is divided into a left wall panel 6 and a right wall panel 6. The rotating shaft 3 is installed between the left wall panel 6 and the right wall panel 6, forming a space between the left wall panel 6 and the right wall panel 6 for mounting the seat plate 5.

[0039] The seat 5 of the classroom chair is fixedly mounted on the rotating shaft 3 via the connector 4, and the seat 5 is configured to move downwards near the backrest of the classroom chair under its own weight, thus flipping the seat 5. Figure 1 As shown, when the seat plate 5 is flipped and in an inclined state, there is an angle between the seat plate 5 and the front chair leg. This angle is generally between 20 degrees and 25 degrees, and preferably 23 degrees.

[0040] like Figure 2 , Figure 3 , Figure 4 as well as Figure 6 As shown, the locking member 2 is fixedly installed at the end of the lifting rod 10 of the linear push rod 1. The rotating shaft 3 is provided with an anti-rotation part that matches the locking member 2. When the seat plate 5 is in an inclined state under its own weight and the linear push rod 1 is extended, the lifting rod 10 pushes the locking member 2 to move. The locking member 2 cooperates with the anti-rotation part to lock the state of the seat plate 5.

[0041] As a preferred option, in order to ensure that the seat board 5 can automatically flip when no one is seated, a counterweight can be installed at the end of the seat board 5 near the back of the classroom chair, so that the seat can complete the automatic flipping action under the combined action of its own weight and the weight of the counterweight.

[0042] As a preferred technical solution, the locking element 2 is a locking pin, and the anti-rotation part is a anti-rotation hole. When the seat plate 5 is tilted under its own weight, the locking pin is aligned with the anti-rotation hole. After prolonged use, classroom chairs are prone to problems such as wear on the rotating shaft 3 and deformation of the seat plate 5. In this case, the angle between the seat plate 5 and the front leg will change. If the size of the locking pin is the same as the size of the anti-rotation hole, the locking pin will not be perfectly aligned with the anti-rotation hole.

[0043] Preferably, the anti-rotation hole is circular, the locking pin is cylindrical, and the diameter of the anti-rotation hole is slightly larger than that of the locking pin. This ensures that the locking pin can smoothly insert into the anti-rotation hole when the seat plate 5 needs to be locked after prolonged use. Alternatively, a groove can be provided at the end of the locking member 2 near the anti-rotation part, and the anti-rotation part can be set as a protrusion that matches the groove. The groove and the protrusion cooperate to achieve the locking of the locking member 2 and the anti-rotation part, thereby locking the seat plate 5.

[0044] As a preferred technical solution, such as Figure 3 , Figure 4 as well as Figure 5 As shown, the linear actuator 1 is fixedly installed on the wall panel 6 of the classroom chair and located below the seat plate 5. The classroom chair locking structure also includes a fixing component, through which the linear actuator 1 is fixedly installed on the wall panel 6. Specifically, the fixing component includes a clamp 8 and a screw 9. The clamp 8 is fixedly installed on the wall panel 6 by the screw 9, and the linear actuator 1 is located between the clamp 8 and the wall panel 6. That is, after the screw 9 passes through the mounting holes at both ends of the clamp 8, the clamp 8 is fixedly installed on the wall panel 6 and located outside the groove 7. At this time, the clamp 8 is in close contact with the outer shell of the linear actuator 7 to fix the linear actuator 7 in the groove 7.

[0045] To reduce vibration and impact force when the linear actuator 1 moves, driving the locking pin to insert into the anti-rotation hole, a shock-absorbing pad can be provided on the top of the locking pin and / or inside the anti-rotation hole. The material of the shock-absorbing pad includes, but is not limited to, rubber.

[0046] When the seat plate 5 is not locked, the linear actuator 1 is inactive, and the lifting rod 10 is in its initial position. The locking member 2 is disengaged from the anti-rotation part, and the seat plate 5 can rotate freely. When the seat plate 5 needs to be locked, the seat plate 5 flips downward and is in an inclined state. At this time, the linear actuator 1 is activated, causing the lifting rod 10 to rise, driving the locking member 2 to engage with the anti-rotation part, thereby locking the seat plate 5. Generally, a corresponding central control console can be configured in the classroom to lock the seat plate 5 of the classroom chairs from the back row to the front row, depending on the number of students in the class and the actual situation.

[0047] To ensure the classroom chair can be used even in the event of a power outage or malfunction of the linear actuator 1, the locking member 2 is detachably installed at the end of the lifting rod 10. Specifically, a mounting groove matching the locking member 2 can be formed at the end of the lifting rod 10 (for example, when the locking member 2 is a cylindrical locking pin, the mounting groove is cylindrical), and threaded holes are provided at the end of the locking member 2 that inserts into the mounting groove and on the side wall of the mounting groove. The locking member 2 is fixedly installed at the end of the lifting rod 10 by screwing a locking nut into the threaded hole at one end of the locking member 2 and the threaded hole on the side wall of the mounting groove. When it is necessary to remove the locking member 2, the locking nut is rotated and unscrewed from the threaded hole. Furthermore, to prevent the locking member 2 from loosening, after fixing the locking member 2 with the locking nut, a locking nut can be installed at the end of the locking nut located on the outside of the lifting rod 10. This locking nut is preferably a nylon insert nut.

[0048] In summary, the classroom chair locking structure, by setting a locking element 2 at the end of the lifting rod 10 of the linear pusher 1 and setting an anti-rotation part on the rotating shaft 3 that matches the locking element 2, can lock the seat plate 5 in a tilted state under its own weight through the cooperation of the locking element 2 and the anti-rotation part. This solves the problem that existing classroom chair rows cannot lock the flip-up seat plate 5 according to actual needs, and has good practicality. Therefore, the locking structure can lock the chair state according to actual conditions, such as locking a certain number of seat plates 5 from the back row to the front, so that students can sit in the front row as much as possible during class.

[0049] This embodiment also provides a classroom chair, which includes the aforementioned classroom chair locking structure. For example... Figure 4 As shown, the wall panel 6 is provided with a groove 7 that matches the housing of the linear actuator 1, and the linear actuator 1 is installed in the groove 7.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A classroom chair locking structure, characterized in that, The classroom chair locking structure includes a linear push rod, a locking component, a rotating shaft, and a connecting component. The rotating shaft is rotatably mounted on the body of the classroom chair. The seat of the classroom chair is fixedly mounted on the rotating shaft via the connecting component. The locking component is fixedly mounted on the end of the lifting rod of the linear push rod. The rotating shaft is provided with an anti-rotation part that matches the locking component. When the seat is tilted under its own weight and the linear push rod extends, the lifting rod pushes the locking component to move towards the anti-rotation part. The locking component cooperates with the anti-rotation part to lock the seat.

2. The classroom chair locking structure as described in claim 1, characterized in that, The locking element is a locking pin, and the anti-rotation part is an anti-rotation hole. When the base plate is tilted under its own weight, the locking pin is directly opposite the anti-rotation hole.

3. The classroom chair locking structure as described in claim 2, characterized in that, The linear actuator is fixedly installed on the wall panel of the classroom chair and located below the seat.

4. The classroom chair locking structure as described in claim 3, characterized in that, The classroom chair locking structure also includes a fixing member, through which the linear push rod is fixedly installed on the wall panel.

5. A classroom chair locking structure as described in claim 4, characterized in that, The fastener includes a clamp and a screw. The clamp is fixedly installed on the wall panel by the screw, and the linear push rod is located between the clamp and the wall panel.

6. A classroom chair locking structure as described in claim 5, characterized in that, The top of the locking pin and / or the anti-rotation hole are provided with shock-absorbing pads.

7. A classroom chair, characterized in that, Includes the classroom chair locking structure as described in any one of claims 1-6.

8. A classroom chair as described in claim 7, characterized in that, The classroom chair also includes a wall panel with a groove that matches the housing of the linear actuator, and the linear actuator is installed in the groove.

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