A telescopic burette holder

Abstract

The utility model relates to the technical field of laboratory apparatus, especially a telescopic burette fixing frame, when personnel adjust the length of the fixing frame according to demand, the positioning pin is separated from the positioning hole in the current position, then the connecting frame on both sides is pulled to make the spacing of the connecting frame on both sides larger, at the same time, the scissors type telescopic mechanism can be unfolded, the connecting block on both sides is driven to move upward along the sliding slot, the connecting block can drive the U-shaped block to move upward, when the connecting hole of the U-shaped block corresponds to the positioning hole in the corresponding position, the positioning pin is connected with the positioning hole through the connecting hole, thereby the spacing of the connecting frame on both sides is fixed, after ending, the positioning pin is separated, then the connecting frame is pushed, the positioning pin is connected with the positioning hole in the lowermost end, the fixing frame is recycled, the length of the burette fixing frame is adjusted, the occupied laboratory table surface or storage cabinet space is reduced when idle or in use, and the scientific research personnel use and carry conveniently.

Description

Technical Field

[0001] This utility model relates to the field of laboratory equipment technology, specifically a retractable burette holder. Background Technology

[0002] In the field of modern chemical experiments and analysis, the precise fixation and flexible operation of burettes are key to ensuring the reliability of experimental data.

[0003] Existing burette holders are mostly one-piece structures with relatively fixed lengths and large volumes. They occupy a lot of laboratory bench space or storage space when not in use or when not in use, and are not easy to move or use. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a retractable burette holder.

[0005] To achieve the above objectives, this utility model provides the following technical solution: Design a retractable burette holder, including a connecting frame, a scissor-type telescopic mechanism, and a limiting component. The connecting frame is mirrored on both sides of the scissor-type telescopic mechanism, and a limiting component is provided on one side of the connecting frame away from the scissor-type telescopic mechanism.

[0006] Preferably, the side end of the connecting frame adjacent to the limiting member is provided with multiple positioning holes, and the spacing between the positioning holes on any two adjacent sides is the same. The connecting frame is provided with a sliding groove on one side adjacent to the scissor telescopic mechanism, and a connecting block is provided inside the sliding groove; A first block and a second block are respectively provided on the side end of the connecting frame away from the limiting member, and the first block and the second block are respectively located on the two sides of the connecting frame away from the limiting member. A rubber pad is provided in the middle of the first block, and the axis of the rubber pad is on the same axis as the axis of the first block.

[0007] Preferably, a fixing member is provided in the middle of the second block.

[0008] Preferably, the fastener includes a screw, a round block, an ear block, and a clamping block; The outer wall of the screw is threaded to the second block, the upper end of the screw is fixedly connected to the round block, and the round block is provided with lugs on both sides, and the lugs on both sides are symmetrically mirrored. The lower end of the screw is provided with a clamping block, and the axis of the clamping block and the axis of the rubber pad are on the same axis.

[0009] Preferably, the limiting component includes a U-shaped block and a positioning pin. Both ends of the U-shaped block are fixedly connected to the connecting block. A connecting hole is provided in the middle of the U-shaped block. The inner diameter of the connecting hole is the same as the outer diameter of the positioning pin. The connecting hole can match the positioning pin. The outer diameter of the positioning pin is the same as the inner diameter of the positioning hole, and the positioning pin can match the positioning hole.

[0010] Preferably, the upper ends of the scissor telescopic mechanism are hinged to the connecting frames on both sides, and the lower ends of the scissor telescopic mechanism are hinged to the connecting blocks on both sides.

[0011] Preferably, the front section of the scissor telescopic mechanism and the upper end of the connecting frame are respectively provided with adjustment seats.

[0012] Preferably, the adjusting seat includes a first damping shaft, a rotating block, a second damping shaft, and a support block; The fixed ends of the first damping shafts are respectively fixedly connected to the scissor telescopic mechanism and the connecting frames on both sides. The rotating ends of the first damping shafts are fixedly connected to the rotating blocks. The middle part of the rotating blocks is fixedly connected to the rotating ends of the second damping shafts. The rotating ends of the second damping shafts are fixedly connected to the support blocks.

[0013] Preferably, the front end of the support block is provided with a fixing clip.

[0014] The present invention provides a retractable burette holder with the following advantages: When adjusting the length of the holder according to needs, the positioning pin is separated from the positioning hole at the current position. Then, the connecting frames on both sides are pulled to increase the distance between them. At the same time, the scissor-type telescopic mechanism unfolds, driving the connecting blocks on both sides to move upward along the slide groove. The connecting blocks can drive the U-shaped block to move upward. When the connecting hole of the U-shaped block corresponds to the positioning hole at the corresponding position, the positioning pin passes through the connecting hole and connects with the positioning hole, thereby fixing the distance between the connecting frames on both sides. After completion, the positioning pin is separated, and then the connecting frame is pushed to connect the positioning pin with the positioning hole at the bottom, realizing the retraction of the holder. This allows for adjustment of the length of the burette holder, reducing the space occupied on the laboratory table or storage cabinet when not in use or in use, and facilitating use and handling by researchers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is an exploded view of the structure of this utility model; Figure 4This is a schematic diagram of the structure of the adjusting seat and fixing clamp of this utility model.

[0016] In the diagram: 1. Connecting frame; 101. Connecting block; 102. Slide groove; 103. First square block; 104. Rubber pad; 105. Second square block; 106. Positioning hole; 2. Scissor telescopic mechanism; 3. Adjusting seat; 301. First damping shaft; 302. Rotating block; 303. Second damping shaft; 304. Support block; 4. Fixing clamp; 401. First fixing block; 402. Second fixing block; 403. Torsion spring; 404. First fixing port; 405. Second fixing port; 5. Limiting component; 501. U-shaped block; 5011. Connecting hole; 502. Positioning pin; 6. Fixing component; 601. Screw; 602. Round block; 603. Ear block; 604. Clamping block. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings: See attached document Figure 1-4 A retractable burette holder includes a connecting frame 1, a scissor-type telescopic mechanism 2, and a limiting member 5. The connecting frame 1 is mirrored on both sides of the scissor-type telescopic mechanism 2, and the limiting member 5 is provided on the side of the connecting frame 1 away from the scissor-type telescopic mechanism 2.

[0018] Multiple positioning holes 106 are provided on the side end of the connecting frame 1 adjacent to the limiting member 5, and the positioning holes 106 on any two adjacent sides are spaced the same. A slide groove 102 is provided on the side of the connecting frame 1 adjacent to the scissor telescopic mechanism 2. A connecting block 101 is provided inside the slide groove 102. A first block 103 and a second block 105 are respectively provided on the side end of the connecting frame 1 away from the limiting member 5. The first block 103 and the second block 105 are respectively located on the two sides of the connecting frame 1 away from the limiting member 5. A rubber pad 104 is provided in the middle of the first block 103, and the axis of the rubber pad 104 is on the same axis as the axis of the first block 103. A convex strip is provided on the inner side of the slide groove 102, so that the cross-sectional shape of the slide groove is "convex". The slide grooves 102 on both sides of the connecting frame 1 are symmetrically mirrored, so as to avoid the displacement of the two sides of the connecting block 101 during the movement within the slide groove 102.

[0019] A fixing component 6 is provided in the middle of the second block 105. The fixing component 6 includes a screw 601, a round block 602, an ear block 603, and a clamping block 604. The outer wall of the screw 601 is threaded to the second block 105. The upper end of the screw 601 is fixedly connected to the round block 602. An ear block 603 is provided on both sides of the round block 602. The ear block 603 facilitates the rotation of the round block 602, so that the round block 602 can drive the screw 601 to move downward along the second block 105. The clamping block 604 and the rubber pad 104 can fix the fixing frame to the reagent rack and tabletop in the laboratory table, which can save the space of the laboratory table and keep the laboratory table clean and orderly.

[0020] Furthermore, the ear blocks 603 on both sides are arranged symmetrically and mirror images, and the lower end of the screw 601 is provided with a clamping block 604, the axis of the clamping block 604 and the axis of the rubber pad 104 are on the same axis.

[0021] The limiting component 5 includes a U-shaped block 501 and a positioning pin 502. Both ends of the U-shaped block 501 are fixedly connected to the connecting block 101. A connecting hole 5011 is provided in the middle of the U-shaped block 501. The inner diameter of the connecting hole 5011 is the same as the outer diameter of the positioning pin 502, and the connecting hole 5011 can match the positioning pin 502. The outer diameter of the positioning pin 502 is the same as the inner diameter of the positioning hole 106, and the positioning pin 502 can match the positioning hole 106. By separating the positioning pin 502 from the positioning hole 106 at the current position, the connecting brackets 1 on both sides are pulled to increase the distance between the connecting brackets 1 on both sides. At the same time, the scissor telescopic mechanism 2 can be extended. By driving the connecting blocks 101 on both sides to move upward along the slide groove 102, the connecting blocks 101 can drive the U-shaped block 501 to move upward. When the connecting hole 5011 of the U-shaped block 501 corresponds to the positioning hole 106 at the corresponding position, the positioning pin 502 passes through the connecting hole 5011 and connects with the positioning hole 106, thereby fixing the spacing of the connecting frame 1 on both sides. The upper two sides of the scissor telescopic mechanism 2 are hinged to the connecting frame 1 on both sides respectively, and the lower two sides of the scissor telescopic mechanism 2 are hinged to the connecting blocks 101 on both sides respectively. The connection end of the positioning pin 502 and the positioning hole 106 can be threaded to avoid the positioning pin 502 from separating from the positioning hole 106.

[0022] Adjustment seats 3 are respectively provided at the front end of the scissor telescopic mechanism 2 and the upper end of the connecting frame 1. The adjustment seat 3 includes a first damping shaft 301, a rotating block 302, a second damping shaft 303, and a support block 304. The fixed ends of the multiple first damping shafts 301 are fixedly connected to the scissor telescopic mechanism 2 and the connecting frames 1 on both sides. The rotating ends of the first damping shafts 301 are fixedly connected to the rotating blocks 302. The middle part of the rotating block 302 is fixedly connected to the rotating end of the second damping shaft 303. The rotating end of the second damping shaft 303 is fixedly connected to the support block 304. A fixing clip 4 is provided at the front end of the support block 304. The first damping shaft 301 and the second damping shaft 303 are a kind of mechanical rotating connecting parts with a damping structure. When the external force is removed, the damping force can be balanced. Gravity or other external forces allow the rotating component to remain stably stationary at any angle. When the operator rotates the rotating block 302 via the support block 304, the rotating block 302 drives the rotating end of the first damping shaft to rotate. When the external force is removed, the rotating block 302 can remain at the current angle. When the support block 304 is moved, the support block 304 drives the rotating end of the second damping shaft 303 to rotate along the rotating block 302. When the external force is removed, the support block 304 can remain at the current angle. This allows for adjustment of the angle of the fixing clamp 4, enabling researchers to easily rotate the burette to the ideal position according to their own operating habits and experimental perspective requirements. Whether operating from the front, top, or side, the titration process can be ensured to be accurate, significantly improving the comfort and efficiency of experimental operations.

[0023] The fixing clip 4 includes a first fixing block 401, a second fixing block 402, and a torsion spring 403. The two sides of the torsion spring 403 are respectively engaged with the first fixing block 401 and the second fixing block 402, and the first fixing block 401 and the second fixing block 402 are in close contact. The middle part of the torsion spring 403 is located between the first fixing block 401 and the second fixing block 402. Figure 4 The second fixing block 402 shown is wedge-shaped on one side adjacent to the support block 304, so that when the second fixing block 402 is pressed, the second fixing block 402 can rotate around the center of the torsion spring 403, causing the torsion spring 403 to deform. At the same time, the first fixing block 401 and the second fixing block 402 separate. The first fixing block 401 and the second fixing block 402 are respectively provided with a first fixing port 404 and a second fixing port 405. The inner ring surface of the first fixing port 404 and the second fixing port 405 is provided with a rubber pad. The inner diameter of the first fixing port 404 and the second fixing port 405 are 12mm and 20mm respectively. It can fix burettes of various specifications, making the fixing operation of burettes extremely convenient, realizing the quick loading and unloading of burettes without the need for any tools, and significantly shortening the experimental preparation time.

[0024] Working principle: When adjusting the length of the fixed frame according to needs, the positioning pin 502 is separated from the positioning hole 106 at the current position. Then, the connecting frames 1 on both sides are pulled to increase the distance between the connecting frames 1 on both sides. At the same time, the scissor telescopic mechanism 2 can be unfolded, and the connecting blocks 101 on both sides can be moved upward along the slide 102. The connecting blocks 101 can drive the U-shaped block 501 to move upward. When the connecting hole 5011 of the U-shaped block 501 corresponds to the positioning hole 106 at the corresponding position, the positioning pin 502 is passed through the connecting hole 5011 and connected to the positioning hole 106, thereby fixing the distance between the connecting frames 1 on both sides. After that, the positioning pin 502 is separated. Then, the connecting frame 1 is pushed to connect the positioning pin 502 to the positioning hole 106 at the bottom, so as to realize the recycling of the fixed frame.

[0025] When the operator rotates the rotating block 302 via the support block 304, the rotating block 302 drives the rotating end of the first damping shaft to rotate. When the external force is removed, the rotating block 302 can stay at the current angle. When the support block 304 is moved, the support block 304 drives the rotating end of the second damping shaft 303 to rotate along the rotating block 302. When the external force is removed, the support block 304 can stay at the current angle, thereby realizing the adjustment of the angle of the fixing clamp 4. This allows researchers to easily rotate the burette to the ideal position according to their own operating habits and experimental perspective requirements. Whether operating from the front, top, or side, the titration process can be ensured to be accurate, greatly improving the comfort and efficiency of experimental operations.

[0026] When the second fixing block 402 is pressed, it can rotate around the center of the torsion spring 403, causing the torsion spring 403 to deform. At the same time, the first fixing block 401 and the second fixing block 402 separate, and the burette is placed in the corresponding fixing port. When the second fixing block 402 is released, the elastic force of the torsion spring 403 causes the second fixing block 402 to merge with the first fixing block 401. This allows for the fixing of burettes of various specifications, making the fixing operation of burettes extremely convenient and enabling quick loading and unloading of burettes without the need for any tools, significantly shortening the experimental preparation time.

[0027] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A retractable burette holder, characterized in that: It includes a connecting frame, a scissor telescopic mechanism, and a limiting component. The connecting frame is mirrored on both sides of the scissor telescopic mechanism, and a limiting component is provided on one side of the connecting frame away from the scissor telescopic mechanism.

2. The retractable burette holder according to claim 1, characterized in that: The side end of the connecting frame adjacent to the limiting member is provided with multiple positioning holes, and the spacing between the positioning holes on any two adjacent sides is the same. The connecting frame is provided with a sliding groove on one side adjacent to the scissor telescopic mechanism, and a connecting block is provided inside the sliding groove; A first block and a second block are respectively provided on the side end of the connecting frame away from the limiting member, and the first block and the second block are respectively located on the two sides of the connecting frame away from the limiting member. A rubber pad is provided in the middle of the first block, and the axis of the rubber pad is on the same axis as the axis of the first block.

3. The retractable burette holder according to claim 2, characterized in that: A fixing element is provided in the middle of the second block.

4. A retractable burette holder according to claim 3, characterized in that: The fastener includes a screw, a round block, an ear block, and a clamping block; The outer wall of the screw is threaded to the second block, the upper end of the screw is fixedly connected to the round block, and the round block is provided with lugs on both sides, and the lugs on both sides are symmetrically mirrored. The lower end of the screw is provided with a clamping block, and the axis of the clamping block and the axis of the rubber pad are on the same axis.

5. A retractable burette holder according to claim 1, characterized in that: The limiting component includes a U-shaped block and a positioning pin. Both ends of the U-shaped block are fixedly connected to the connecting block. A connecting hole is provided in the middle of the U-shaped block. The inner diameter of the connecting hole is the same as the outer diameter of the positioning pin. The connecting hole can match the positioning pin. The outer diameter of the positioning pin is the same as the inner diameter of the positioning hole, and the positioning pin can match the positioning hole.

6. The retractable burette holder according to claim 1, characterized in that: The upper two sides of the scissor telescopic mechanism are hinged to the connecting frames on both sides, and the lower two sides of the scissor telescopic mechanism are hinged to the connecting blocks on both sides.

7. A retractable burette holder according to claim 1, characterized in that: Adjustment seats are respectively provided at the front section of the scissor telescopic mechanism and the upper end of the connecting frame.

8. A retractable burette holder according to claim 7, characterized in that: The adjusting seat includes a first damping shaft, a rotating block, a second damping shaft, and a support block; The fixed ends of the first damping shafts are respectively fixedly connected to the scissor telescopic mechanism and the connecting frames on both sides. The rotating ends of the first damping shafts are fixedly connected to the rotating blocks. The middle part of the rotating blocks is fixedly connected to the rotating ends of the second damping shafts. The rotating ends of the second damping shafts are fixedly connected to the support blocks.

9. A retractable burette holder according to claim 8, characterized in that: The front end of the support block is provided with a fixing clip.

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