Push-pull blackboard
Through the coordination of designing frame structure and sliding components, the problem of inconsistency in the traditional push-pull blackboard plane is solved, and the coherence of complete flatness and sliding of the blackboard board is achieved, which improves the teaching and demonstration effect, and simplifies cleaning and maintenance.
Patent Information
- Application Number
- CN202421280335.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-06
AI Technical Summary
Due to the limitation of the sliding support structure of the traditional push and pull blackboard, the two blackboards are not easily located in the same plane, resulting in a gap between the boards, affecting the integrity and fluency of the blackboard, increasing the difficulty of teaching and demonstration, and easily accumulating dust and debris. Increases cleaning and maintenance difficulties.
A push-pull blackboard is designed, adopting a frame structure, with two push-pull blackboards sliding in the middle. Through the cooperation of sliding components and guiding components, the four blackboard panels can be fully expanded and in the same plane, achieving smooth and coherent sliding. , and through the cooperation of the locking tongue and the limiting mechanism, the blackboard can be stacked and smoothly when opened and closed.
The blackboard surface is completely flat, ensuring the complete display of the content of the blackboard, improving the teaching and demonstration effect, enhancing the fluency of the blackboard, and simplifying the cleaning and maintenance process.
Smart Images
Figure CN222473741U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blackboard devices, in particular to a push-pull type blackboard. Background Art
[0002] Traditional sliding blackboards usually use two independent blackboard surfaces, which are pushed and pulled by a sliding mechanism. However, when the blackboard surfaces slide, due to the limitation of the sliding support structure, it is not easy for the two blackboards to be completely in the same plane. This inconsistent plane will cause a gap between the blackboard surfaces, making it impossible to fully display the content on the blackboard. At the same time, the fluency of the blackboard writing is also affected because there will be incoherence or interruption when sliding the surface.
[0003] This phenomenon is an inconvenience for teaching and demonstration activities in schools and offices. When teachers or speakers want to show more content, they need to write in sections on the blackboard or distribute the content on different boards. This not only increases the operation steps, but also reduces the effect of teaching and demonstration, and may cause confusion to students or audiences.
[0004] In addition, the problem of inconsistent planes will also cause gaps or cracks between the blackboard surfaces, which are prone to accumulate dust, powder and other debris, making cleaning and maintenance more difficult. Utility Model Content
[0005] The utility model provides a push-pull blackboard to solve the above-mentioned problems.
[0006] To solve the above technical problems, the technical solution of the utility model is: a push-pull blackboard, comprising a frame, fixed blackboards are fixed on the left and right sides of the front face of the frame, two push-pull blackboards are slidably arranged in the middle of the frame, and tracks for the push-pull blackboards to slide are arranged at the upper and lower ends of the frame, and each of the four corners of the push-pull blackboard is fixed with a sliding assembly, and the sliding assembly is slidably connected with the track. The sliding assembly comprises a base, and a connecting plate is slidably arranged on the upper end of the base through a ball assembly, and the connecting plate is fixedly connected to the push-pull blackboard, and rollers that are rollingly connected with the track are fixedly arranged at the four corners of the bottom of the base, a locking tongue mechanism is fixedly arranged at the bottom of the base, a guide column is fixedly arranged at the bottom of the connecting plate, and a slot hole that is matched and clamped with the locking tongue mechanism is arranged on the side of the guide column, and a guide assembly is fixedly arranged on the bottom surface of the inner part of the track, and the guide assembly comprises a guide block that prompts the guide column to change track, and also comprises a limiting mechanism for controlling the locking and loosening of the locking tongue mechanism.
[0007] Furthermore, the ball assembly includes a pressure cover fixed on the upper end surface of the base, and a plurality of balls are provided on the lower end surface of the pressure cover and the upper end surface of the base. A channel is provided between the pressure cover and the base for the connecting plate to pass through and slide, and the upper and lower end surfaces of the connecting plate are in contact with the balls.
[0008] Furthermore, a tension spring is connected between the upper end of the gland and the connecting plate.
[0009] Furthermore, the locking tongue mechanism includes a shell fixed to the bottom of the base, a locking tongue is slidably arranged inside the shell, a spring is arranged between one end of the locking tongue extending into the shell and the bottom surface of the shell, and the locking tongue is matched and snap-fitted with the slot.
[0010] Furthermore, the limiting mechanism includes an L-shaped limiting plate fixedly arranged on one side of the guide block, the height of the upper end surface of the L-shaped limiting plate gradually increases along the track direction, and the L-shaped limiting plate is matched and clamped with the bottom of the lock tongue.
[0011] Furthermore, handles are fixedly provided at the bottom of the two sliding blackboards.
[0012] Furthermore, two groups of guide components are arranged inside each of the tracks, and the two groups of guide components are arranged respectively close to the connection between the sliding blackboard and the fixed blackboard.
[0013] Furthermore, a rotating ring is sleeved on the bottom of the guide column, and the rotating ring is in contact and rolling connection with the guide block.
[0014] Furthermore, an isolation column is fixedly provided at the bottom of one end of the connecting plate, and the connecting plate is fixedly connected to the top of the sliding blackboard through the isolation column.
[0015] The design of the push-pull blackboard of the utility model solves the problem of inconsistent planes of the existing push-pull blackboards and brings the following more detailed beneficial effects:
[0016] 1) Complete display content: By ensuring that the four blackboard panels can be fully unfolded and in the same plane, the push-pull blackboard can fully display the blackboard content without being blocked or interrupted, which improves the effectiveness of teaching and demonstration and helps the audience or students better understand and follow the content.
[0017] 2) Smooth blackboard writing experience: The sliding components and guide components of the push-pull blackboard work together to make the sliding of the board surface more stable and coherent. Teachers or speakers can write or draw freely without being hindered by the inconsistency of the blackboard surface. This improves the fluency of blackboard writing and makes information transmission more coherent and efficient.
[0018] 3) Stability and safety: The guide column fixed at the bottom of the connecting plate cooperates with the guide block, so that the connecting plate can move forward and backward as the sliding assembly moves left and right; the lock tongue cooperates with the limiting mechanism, when the blackboard is opened, the limiting mechanism releases the lock tongue, and the lock tongue extends into the slot to buckle the connecting plate, thereby fixing the connecting plate in the extended position; when the blackboard is closed, the limiting mechanism pulls the lock tongue downward to disengage the lock tongue from the slot, releasing the lock of the lock tongue on the connecting plate, and the connecting plate retracts under the action of the tension spring. Through the cooperation of the guide assembly and the sliding assembly, the blackboards can be stacked together when opened, and can be on the same plane when closed.
[0019] 5) Convenient cleaning and maintenance: The flat structure of the flat sliding blackboard makes cleaning and maintenance more convenient. There are no raised edges or gaps to avoid the accumulation of dust and debris. Teachers or cleaning staff can clean the blackboard more easily and keep the board clean and tidy. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The utility model is a three-dimensional structural schematic diagram of a push-pull type blackboard.
[0021] Figure 2 The utility model is a structural schematic diagram of the A area of a push-pull type blackboard.
[0022] Figure 3 The utility model is a schematic diagram of the exploded structure of a sliding component of a push-pull blackboard.
[0023] Figure 4 The utility model is an exploded structural schematic diagram of a guide assembly of a push-pull type blackboard.
[0024] Figure 5 The utility model is a schematic diagram of the matching structure of a sliding component and a guide component of a push-pull blackboard.
[0025] Figure 6 The utility model is a schematic cross-sectional structure diagram of a locking state of a locking tongue mechanism of a push-pull type blackboard.
[0026] Figure 7 The utility model is a schematic cross-sectional structure diagram of a lock tongue mechanism of a push-pull blackboard in an open state.
[0027] Figure 8 This is a schematic diagram of the opening process of a push-pull blackboard of the utility model. Figure 1 .
[0028] Fig. 9 This is a schematic diagram of the opening process of a push-pull blackboard of the utility model. Figure 2 .
[0029] As shown in the figure: 1. Frame; 2. Fixed blackboard; 3. Push-pull blackboard; 4. Track; 5. Sliding assembly; 6. Base; 7. Ball assembly; 8. Connecting plate; 9. Roller; 10. Guide column; 11. Slot hole; 12. Guide assembly; 13. Guide block; 14. Limiting mechanism; 15. Pressure cover; 16. Ball; 17. Tension spring; 18. Shell; 19. Lock tongue; 20. Spring; 21. Handle; 22. Rotating ring; 23. Isolation column. DETAILED DESCRIPTION
[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", "center", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction structure and operation. Therefore, they should not be understood as limitations on the present invention.
[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "provided with", "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0032] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0033] Combined with Figure 1 To Attachment Fig. 9A push-pull blackboard comprises a frame 1, wherein fixed blackboards 2 are fixedly arranged on the left and right sides of the front of the frame 1, two push-pull blackboards 3 are slidably arranged in the middle of the frame 1, and handles 21 are fixedly arranged at the bottom of the two push-pull blackboards 3, and tracks 4 for sliding the push-pull blackboards 3 are arranged at the upper and lower ends of the frame 1, and sliding components 5 are fixedly arranged at the four corners of each of the push-pull blackboards 3, and the sliding components 5 are matched and slidably connected with the tracks 4, and the sliding components 5 include a base 6, and a connecting plate 8 is slidably arranged on the upper end of the base 6 through a ball bearing assembly 7, and the connecting plate 8 is fixedly connected to the push-pull blackboard 3, so that Rollers 9 that are matched and rollingly connected to the track 4 are fixedly provided at the four corners of the bottom of the base 6, a locking tongue mechanism is fixedly provided at the bottom of the base 6, a guide column 10 is fixedly provided at the bottom of the connecting plate 8, and a slot 11 that is matched and snapped with the locking tongue mechanism is provided on the side of the guide column 10. A guide assembly 12 is fixedly provided on the bottom surface of the inner part of the track 4. The guide assembly 12 includes a guide block 13 that causes the guide column 10 to change track, and also includes a limiting mechanism 14 that controls the locking and loosening of the locking tongue mechanism. Two groups of guide assemblies 12 are arranged inside each of the tracks 4, and the two groups of guide assemblies 12 are respectively arranged near the connection between the sliding blackboard 3 and the fixed blackboard 2.
[0034] Reference Figure 3 In this embodiment, the ball assembly 7 includes a pressure cover 15 fixed on the upper end surface of the base 6, and a plurality of balls 16 are provided on the lower end surface of the pressure cover 15 and the upper end surface of the base 6. A channel is provided between the pressure cover 15 and the base 6 for the connecting plate 8 to pass through and slide. The upper and lower end surfaces of the connecting plate 8 are in contact with the balls 16, and a tension spring 17 is connected between the upper end of the pressure cover 15 and the connecting plate 8.
[0035] Reference Figure 3 , Attachment Figure 6 , Attachment Figure 7 The locking tongue mechanism includes a housing 18 fixed to the bottom of the base 6, a locking tongue 19 is slidably arranged inside the housing 18, a spring 20 is arranged between the end of the locking tongue 19 extending into the housing 18 and the bottom surface of the housing 18, and the locking tongue 19 is matched and engaged with the slot 11. The limiting mechanism 14 includes an L-shaped limiting plate fixed to one side of the guide block 13, the upper end surface height of the L-shaped limiting plate gradually increases along the direction of the track 4, and the L-shaped limiting plate and the bottom of the locking tongue 19 are matched and engaged.
[0036] Reference Figure 3 A rotating ring 22 is sleeved on the bottom of the guide column 10, and the rotating ring 22 is in contact and rolling connection with the guide block 13. An isolation column 23 is fixedly provided at the bottom of one end of the connecting plate 8, and the connecting plate 8 is fixedly connected to the top of the sliding blackboard 3 through the isolation column 23.
[0037] Specific implementation mode of the utility model: Taking the fixed blackboard 2 and the push-pull blackboard 3 in the left half as an example, when the utility model is in use, the handle 21 is held to pull the push-pull blackboard 3 to the left, and the sliding assembly moves to the left side with the push-pull blackboard. During the movement, the rotating ring 22 on the guide column 10 is blocked by the guide block 13 and changes the movement trajectory, prompting the connecting plate 8 to slide outward in the channel, and the tension spring 17 is stretched. At the same time, the lock tongue 19 was originally at the lowest point of the L-shaped limit plate. As the sliding assembly moves to the left, the lock tongue 19 moves to the left and moves to the highest point of the L-shaped limit plate under the support of the spring 20. At this position, it is just engaged with the slot 11 on the guide column 10 moving outward, thereby fixing the connecting plate 8 in the state of extending outward, preventing the push-pull blackboard 3 from freely extending and retracting in the front and rear directions during the movement, and ensuring the stability of the push-pull process of the push-pull blackboard 3.
[0038] On the contrary, when the sliding blackboard 3 needs to be reset, the sliding blackboard 3 is pushed to the right, and the lock tongue 19 first passes through the highest point of the L-shaped limit plate, and then gradually moves to the lowest point of the L-shaped limit plate. During this movement, the lock tongue 19 is pulled by the gradually descending shape of the L-shaped limit plate, and the lock tongue 19 gradually moves downward until it is out of the slot 11, and then under the restoring force of the tension spring 17, the connecting plate 8 contracts inward, and the sliding blackboard 3 is also reset to a flat state under the action of the tension spring 13.
[0039] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A push-pull blackboard, comprising a frame (1), wherein fixed blackboards (2) are fixedly arranged on both the left and right sides of the front of the frame (1), two push-pull blackboards (3) are slidably arranged in the middle of the frame (1), and rails (4) are arranged at both the upper and lower ends of the frame (1) for the push-pull blackboards (3) to slide, characterized in that: A sliding assembly (5) is fixedly provided at the four corners of each of the push-pull blackboards (3), and the sliding assembly (5) is slidably connected to the track (4). The sliding assembly (5) comprises a base (6), and a connecting plate (8) is slidably provided at the upper end of the base (6) through a ball assembly (7), and the connecting plate (8) is fixedly connected to the push-pull blackboard (3). Rollers (9) that are rollingly connected to the track (4) are fixedly provided at the four corners of the bottom of the base (6). A locking tongue mechanism is fixedly provided at the bottom of the base (6), and a guide column (10) is fixedly provided at the bottom of the connecting plate (8). A slot (11) that is matched and snapped with the locking tongue mechanism is provided on the side of the guide column (10). A guide assembly (12) is fixedly provided on the inner bottom surface of the track (4), and the guide assembly (12) comprises a guide block (13) that causes the guide column (10) to change track, and also comprises a limiting mechanism (14) that controls the locking and loosening of the locking tongue mechanism.
2. A push-pull blackboard according to claim 1, characterized in that: The ball assembly (7) comprises a pressure cover (15) fixedly arranged on the upper end surface of the base (6); a plurality of balls (16) are arranged on the lower end surface of the pressure cover (15) and the upper end surface of the base (6); a channel for the connecting plate (8) to pass through and slide is arranged between the pressure cover (15) and the base (6); and the upper and lower end surfaces of the connecting plate (8) are in contact with the balls (16).
3. A push-pull blackboard according to claim 2, characterized in that: A tension spring (17) is provided between the upper end of the pressure cover (15) and the connecting plate (8).
4. A push-pull blackboard according to claim 1, characterized in that: The locking tongue mechanism comprises a shell (18) fixedly arranged at the bottom of the base (6), a locking tongue (19) being slidably arranged inside the shell (18), a spring (20) being arranged between one end of the locking tongue (19) extending into the shell (18) and the bottom surface of the shell (18), and the locking tongue (19) being matched and snap-fitted with the slot (11).
5. A push-pull blackboard according to claim 4, characterized in that: The limiting mechanism (14) comprises an L-shaped limiting plate fixedly arranged on one side of the guide block (13), the upper end surface height of the L-shaped limiting plate gradually increases along the direction of the track (4), and the L-shaped limiting plate and the bottom of the locking tongue (19) are matched and clamped.
6. The push-pull blackboard according to claim 1, characterized in that: Handles (21) are fixedly provided at the bottom of the two sliding blackboards (3).
7. The push-pull blackboard according to claim 1, characterized in that: Two groups of guide components (12) are arranged inside each track (4), and the two groups of guide components (12) are arranged close to the connection between the sliding blackboard (3) and the fixed blackboard (2).
8. The push-pull blackboard according to claim 1, characterized in that: The bottom of the guide column (10) is sleeved with a rotating ring (22), and the rotating ring (22) is in contact and rolling connection with the guide block (13).
9. The push-pull blackboard according to claim 1, characterized in that: An isolation column (23) is fixedly provided at the bottom of one end of the connecting plate (8), and the connecting plate (8) is fixedly connected to the top of the sliding blackboard (3) via the isolation column (23).