Triggering structure of push switch of electric lifting platform
The vertical press switch mechanism with a spring-loaded contact and cushioning in the electrically operated height-adjustable table addresses precision and wear issues, ensuring accurate and reliable operation by preventing accidental activation and reducing mechanical stress.
Patent Information
- Application Number
- CN202422335764.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The push switch trigger structure of the existing electric lift platform has problems such as difficult to control assembly accuracy and easy to operate incorrectly, resulting in stroke errors and wear or damage to the push switch.
The vertical sliding joint is adopted to prevent misoperation and overpressure structure, and there is a gap between the shrapnel and the contacts of the press switch, which is triggered only when it is actually pressed. Combined with the buffer spring and vertical limit structure, it prevents misoperation and excessive pressing.
It improves the assembly accuracy of the press switch, avoids erroneous operation and wear, extends the service life of the press switch, and ensures the stability and reliability of the electric lifting platform.
Smart Images
Figure CN223108738U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of office equipment, and particularly to a trigger structure of a push switch of an electric lifting table. Background Art
[0002] In order to enable an existing fixed office desk to meet the need of computer lifting for realizing sit-stand alternating office, a workbench with an electric lifting table placed on the desktop and driven by a scissor-type lifting arm has been gradually popularized and applied in recent years.
[0003] In order to control the lower limit position of the upper platform and prevent the upper platform from pinching hands with the lower platform, generally, a push switch for controlling the on-off of the power supply, such as a travel switch, a micro switch, or a pressure sensor electrically connected to a controller, is provided at the bottom of the upper platform or the top of the lower platform.
[0004] However, the trigger structure of the push switch in the prior art still has the following deficiencies: for example, some adopt a sliding trigger structure, and it is difficult to control the assembly accuracy, which is prone to misoperation, easily leads to the travel error of the electric lifting table and affects the sensitivity of cutting off the power supply, and the long-term friction is easy to cause wear of the push switch. For example, some adopt a vertical trigger, but they are all hard touches, and the push switch is prone to collision damage after long-term use. Summary of the Utility Model
[0005] The technical problem to be solved by the utility model is to provide a trigger structure of a push switch of an electric lifting table that can prevent misoperation, accurately control the travel of the lifting table, and relatively reduce the friction wear and collision damage of the push switch.
[0006] The technical solution of the utility model is to provide a trigger structure of a push switch of an electric lifting table. A push cover is slidably fitted in a vertical through hole of a push switch box. An elastic sheet for vertically pressing a contact of the push switch is installed in the push cover. A vertical limiting structure for preventing the push cover from running out of the vertical through hole is provided on the push cover and the push switch box.
[0007] After adopting the above structure, the trigger structure of the push switch of the electric lifting platform of the utility model has the following advantages: according to the different situations of the prior art, the push switch is installed at the bottom of the upper platform or at the top of the lower platform, and the pressing action is vertical. When there is no pressing, there is a gap between the spring and the contact. Only after the top surface of the lower platform or the bottom surface of the upper platform actually presses the pressing cover, the spring will press the contact of the push switch, which will not cause misoperation. Its assembly accuracy is also easy to control, and it will not cause the travel error of the electric lifting platform, and it can also ensure the sensitivity of cutting off the power supply. In particular, the use of elastic springs to press avoids the hard collision of the prior art, and will not cause friction and wear of the contacts of the push switch such as the travel switch or the micro switch or the pressure sensor, nor will it cause collision damage caused by hard touch. It not only ensures the stability and reliability of the operation of the electric lifting platform, but also extends the service life of the push switch.
[0008] Furthermore, one end of the spring is fixed in the pressing cover, and the other end of the spring is the pressing end for pressing the contact of the push switch. With the above structure, one end of the spring is fixed, and the other end of the spring presses the contact, which not only ensures the reliability of the spring pressing, but also reflects the elasticity of the pressing, further ensuring the technical effect of preventing damage to the push switch and ensuring the stability and reliability of the electric lifting platform.
[0009] Furthermore, the pressing end of the spring piece is always inclined toward the contact of the push switch when in a naturally released state. With the above structure, the elastic force of the spring piece's natural extension is utilized to further ensure the reliability of the spring piece's pressing and the protective function of the elastic pressing on the contact of the push switch.
[0010] Furthermore, a fixing column is provided in the end plate of the pressing cover, a threaded hole is provided on the fixing column, a screw hole is provided at one end of the spring sheet, a screw passes through the screw hole and is screwed into the threaded hole to fix one end of the spring sheet. With the above structure, the fixing structure of the spring sheet is simple and convenient to install or remove.
[0011] Furthermore, the trigger structure of the push switch of the electric lift platform of the utility model further includes one or more buffer springs, one end of each buffer spring abuts against the bottom surface of the upper platform or the top surface of the lower platform of the electric lift platform, and the other end of each buffer spring abuts against the inner end surface of the end plate of the push cover. After adopting the above structure, the top surface of the lower platform or the bottom surface of the upper platform has a damping or buffering effect on the pressing process of the push cover, further reducing the impact force of the pressing process on the contact of the push switch.
[0012] Furthermore, a vertical spring sleeve for accommodating respective buffer springs is arranged in the pressing cover. With the above structure, the springs in the pressing cover have good fixing and guiding effects, further ensuring the buffering effect.
[0013] Furthermore, the sliding height dimension of the pressing cover within the vertical through-hole is equal to 6 mm. After adopting the above structure, it is possible to prevent the pressing cover from sliding vertically by an excessive distance and overpressing the elastic piece and the contact, thereby preventing the pressing cover from applying excessive pressure to the elastic piece and the contact and damaging the elastic piece or the contact. That is, a double insurance is provided for the contact. There is a first insurance that the elastic piece is elastic and does not hard-touch the contact, and a second insurance that limits the sliding distance of the pressing cover to prevent overpressing the contact.
[0014] Furthermore, there are multiple vertical sliding blocks on both side plates of the border of the pressing cover, and there are multiple vertical notches on both side walls of the vertical through-hole of the pressing switch box for the respective multiple vertical sliding blocks to slide vertically and be vertically limited, and the openings of the vertical notches face the pressing switch. After adopting the above specific vertical limiting structure to prevent the pressing cover from slipping out of the vertical through-hole, the guiding property of the vertical sliding of the pressing cover within the through-hole of the pressing switch box is better and smoother, and the vertical limiting structure for preventing the pressing cover from slipping out of the vertical through-hole is simple, and both installation and disassembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural diagram of the trigger structure embodiment of the present invention applied to an electric lifting platform Figure 1 .
[0016] Figure 2 is a schematic structural diagram of the trigger structure embodiment of the present invention applied to an electric lifting platform Figure 2 .
[0017] Figure 3 is Figure 2 an enlarged structural schematic diagram of A in
[0018] Figure 4 is Figure 2 an exploded structural schematic diagram of some components of the trigger structure of the present invention exploded from the electric lifting platform in
[0019] Figure 5 is Figure 4 an enlarged structural schematic diagram of B in
[0020] Figure 6 is Figure 5 an enlarged structural schematic diagram of the pressing cover and the pressing switch box in from another angle (where part of the length of the pressing switch is omitted).
[0021] Figure 7 is Figure 5 an exploded structural schematic diagram from another angle (highlighting that the top of the buffer spring abuts against the bottom surface of the upper platform).
[0022] As shown in the figure:
[0023] 1. Electric lifting table, 11. Upper platform, 111. Bottom surface of the upper platform, 12. Press switch, 121. Contact, 13. Top surface of the lower platform;
[0024] 2. Trigger structure, 21. Press switch box, 211. Vertical through hole, 212. Vertical notch, 22. Press cover, 221. End plate, 222. Fixed column, 2221. Threaded hole, 223. Vertical spring sleeve, 224. Top end surface, 225. Vertical slider, 226. Vertical reinforcing rib plate, 223. Elastic piece, 231. Press end, 232. Screw through hole, 24. Screw, 25. Buffer spring. Specific embodiments
[0025] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted here that the description of these specific embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the following specific embodiments of the present invention can be combined with each other as long as they do not conflict with each other.
[0026] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown.
[0027] The electric lifting table of the prior art, such as Figure 1 , Figure 2 and Figure 3 shown, is an electric lifting table 1 driven by a scissor-shaped lifting arm for lifting. A press switch 12 is provided at the bottom of the upper platform 11, and the top surface 13 of the lower platform touches the contact 121 of the press switch 12 to cut off the power supply. Or a press switch is provided at the top of the lower platform, and the bottom surface of the upper platform touches the contact of the press switch to cut off the power supply. But the former is more than the latter. As Figure 1 , Figure 2 and Figure 3 shown is the former. It is not difficult to understand that the power supply is turned on when the pressing is released. The press switch 12 is such as a travel switch, a microswitch or a pressure sensor electrically connected to the controller, etc.
[0028] As Figure 4 , Figure 5 , Figure 6 and Figure 7As shown in the figure, the triggering structure of the push switch of the electric lifting platform of the present utility model. A push cover 22 is slidably fitted in the vertical through hole 211 of the push switch box 21 of the triggering structure 2. A elastic sheet 23 for vertically pressing the contact 121 of the push switch 12 is installed in the push cover 22. There is a vertical limiting structure on the push cover 22 and the push switch box 21 to prevent the push cover 22 from slipping out of the vertical through hole 211. In this embodiment, the push switch 12 is installed at the bottom of the upper platform 11. A push switch box 21 with an upward opening covers the push switch 21 such as a travel switch, and is fixed such as screwed to the bottom of the upper platform 11 by multiple screws. The push cover 22 extends downward from the vertical through hole 211. There is a vertical limiting structure on the push cover 22 and the push switch box 21 to prevent the push cover 22 from slipping out of the vertical through hole 211 from top to bottom. The elastic sheet 23 vertically presses such as the elastic sheet 23 presses the contact 121 of the push switch 21 from bottom to top. The push cover 22 can also be called a push sleeve.
[0029] One end of the elastic sheet 23 is fixed in the push cover 22, and the other end of the elastic sheet 23 is the pressing end 231 for pressing the contact 121 of the push switch 21.
[0030] When the pressing end 231 of the elastic sheet 23 is in the natural release state, it always inclines towards the contact 121 of the push switch 21. In this embodiment, the pressing end 231 of the elastic sheet 23 always inclines towards the contact 121 of the push switch 12 in the natural release state, that is, it inclines upward. Figure 7 The figure shows the state where the pressing has started. When the top surface 13 of the lower platform does not press the push cover 22, when the elastic sheet 23 is in the natural state, there is a gap between the pressing end 231 of the elastic sheet 23 and the bottom surface of the contact 121.
[0031] The elastic sheet 23 can be fixed by the following specific structure: There is a fixing column 222 in the end plate 221 of the push cover 22. There is a threaded hole 2221 on the fixing column 222. One end of the elastic sheet 23 has a screw through hole 232. A screw 24 passes through the screw through hole 232 and is screwed into the threaded hole 2221 to fix one end of the elastic sheet 23. Such as Figure 5 and Figure 6 As shown in the figure, the bottom end of the fixing column 222 of this embodiment can be fixed such as integrally formed on the end plate 221 of the push cover 22 such as the bottom end plate. The fixing column 222 extends upward. One end of the elastic sheet 23 is fixed to the top end of the fixing column 222 by a screw 24. It is not difficult to understand that except for the fixed end, the other segments of the elastic sheet 23 have space for up and down swinging in the push cover 22, especially there is space for always inclining upward under the elastic force of natural extension until the pressing end 231 presses the contact 121.
[0032] The triggering structure of the push switch of the electric lifting table of the present utility model further includes one or more, such as two buffer springs 25. One end of each buffer spring 25 abuts against the bottom surface 111 of the upper platform or the top surface of the lower platform of the electric lifting table 1, and the other end of each buffer spring 25 abuts against the inner end surface of the end plate 221 of the push cover 22. As Figure 5 , Figure 6 and Figure 7 In the illustrated embodiment, there are two buffer springs 25. The top end of each buffer spring 25 abuts against the bottom surface 111 of the upper platform, and the bottom end of each buffer spring 25 abuts against the inner bottom end surface of the end plate 221 of the push cover 22.
[0033] As Figure 6 shown, there may be vertical spring sleeves 223 for accommodating respective buffer springs 25 inside the push cover 22, such as two circular sleeves each provided with a vertical notch.
[0034] Referring to Figure 4 , Figure 5 , Figure 6 and Figure 7 , the sliding height dimension of the push cover 22 inside the vertical through hole 211 may be equal to 6 mm. When the push switch 12 is provided at the bottom of the upper platform 11, when the outer bottom surface of the end plate 221 of the push cover 22 is at the lowest position, the upward sliding distance is 6 mm. That is, when the top surface of the lower platform 13 presses the end plate 221 of the push cover 22 to make it slide upward inside the vertical through hole 211, when it reaches 6 mm, the top end surface 224 of the frame of the push cover 22 abuts against the bottom surface 111 of the upper platform and stops sliding upward, so as to prevent the push cover 22 from exerting too much pressure on the elastic piece 23 and the contact 121 and damaging the elastic piece 23 or the contact 121. This dimension limit can also be regarded as a double insurance for the contact 121. There is a first insurance that the elastic piece 23 elastically does not hard touch the contact 121, and a second insurance that limits the vertical sliding distance of the push cover 22 to prevent excessive pressure on the contact 121.
[0035] It is not difficult to understand that for the bottom surface 111 of the upper platform, according to the different structures of the respective electric lifting platforms 1, there may be different bottom surfaces 111 of the upper platform. As Figure 7 shown, in this embodiment, the bottom surface of the lifting drive box can be used as the bottom surface 111 of the upper platform of the electric lifting table 1.
[0036] As Figure 6As shown, a vertical limiting structure for preventing the pressing cover 22 from slipping out of the vertical through hole 211, such as preventing the pressing cover 22 from slipping downward out of the vertical through hole 211, can adopt the following specific structure: There are multiple, such as two, vertical sliding blocks 225 on each of the two side plates of the frame of the pressing cover 22. On the two side walls of the vertical through hole 211 of the pressing switch box 21, there are multiple, such as two, respective vertical sliding slots 212 for the respective multiple, such as two, vertical sliding blocks 225 to slide and be vertically limited, and the openings of the vertical sliding slots 212 face the pressing switch 21, such as upward. The vertical sliding slots 212 can also be referred to as vertical notches or vertical openings.
[0037] Such as Figure 6 As shown, multiple vertical reinforcing rib plates 226 can be provided on the end plate 221 and the frame of the pressing cover 22. Another fixing column 222 can also be symmetrically arranged, and it is also provided with a threaded hole 2221 for use as an alternative spare according to different structural requirements. For example, Figure 6 the latter fixing column 222 at the back can be not used, and the former fixing column 222 can be used instead. Of course, the added fixing column 222 also correspondingly enhances the overall strength of the pressing cover 22.
[0038] In the specific embodiments shown in the figure and described above, a pressing switch 12 is provided at the bottom of the upper platform 11, and the contact 121 of the pressing switch 12 is touched by the top surface 13 of the lower platform. It is not difficult to understand that a pressing switch can also be provided at the top of the lower platform, and the contact of the pressing switch is touched by the bottom surface of the upper platform. The specific structures are the same as those described above, only the directions are exactly opposite. What is downward in the above-described embodiments is upward, and what is upward in the above-described embodiments is downward.
[0039] The specific structures of the above-described embodiments are also allowed to have variations. For example, the elastic piece can also be L-shaped, with the short side being the fixed end. The screw can pass through the screw through hole on the short side and be screwed into the threaded hole of the horizontal fixing column on the frame of the pressing cover away from the contact. The number of buffer springs can also be three or one, etc. The vertical spring sleeve can also be not provided, and the two ends of the buffer spring are respectively fixed to the end plate of the pressing cover and the bottom surface of the upper platform or the top surface of the lower platform. The sliding height dimension of the pressing cover in the through hole can also not be limited to 6 mm, but can be changed according to different application environments. The vertical limiting structure for preventing the pressing cover from slipping out of the vertical through hole can also be other specific structures, such as a vertical limiting skirt is provided on the outer periphery of the pressing cover, or a vertical limiting step is provided at the lower part of the pressing cover, etc.
[0040] As described above, it means that when the electric lifting platform descends to the lowest position, the trigger structure of the present invention is adopted to control the on-off of the motor power supply to control the start and stop of the electric lifting platform. It is not difficult to understand that when the lifting platform rises to the highest position, the structure of the existing technology, such as a structure in which a height sensor is combined with the main controller of the electric lifting platform, can be adopted to control the on-off of the motor power supply to control the start and stop of the electric lifting platform.
[0041] The components not marked above or not shown in the structure diagrams, and some components in the figures are not marked in the text. The attached drawings are only schematic. If there are inconsistencies between the attached drawings and the text description, or inconsistencies among the attached drawings themselves, the text description shall prevail.
[0042] The above is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A triggering structure of a push switch for an electric lifting table, characterized in that: A pressing cover is slidably fitted in the vertical through hole of the pressing switch box. A shrapnel for vertically pressing the contact of the pressing switch is installed in the pressing cover. There is a vertical limiting structure on the pressing cover and the pressing switch box to prevent the pressing cover from slipping out of the vertical through hole.
2. The triggering structure of the push switch of the electric lifting platform according to claim 1, wherein: One end of the shrapnel is fixed inside the pressing cover, and the other end of the shrapnel is a pressing end for pressing the contact of the pressing switch.
3. The triggering structure of the push switch of the electric lifting platform according to claim 2, characterized in that: When the pressing end of the shrapnel is in a natural release state, it always inclines towards the contact of the pressing switch.
4. The triggering structure of the push switch of the electric lifting table according to claim 2, characterized in that: There is a fixing post in the end plate of the pressing cover, and there is a threaded hole on the fixing post. There is a screw through hole at one end of the shrapnel. A screw passes through the screw through hole and is tightened in the threaded hole to fix one end of the shrapnel.
5. The triggering structure of the push switch of the electric lifting platform according to claim 1, characterized in that: It also includes one or more buffer springs. One end of each buffer spring abuts against the bottom surface of the upper platform or the top surface of the lower platform of the electric lifting table, and the other end of each buffer spring abuts against the inner end surface of the end plate of the pressing cover.
6. The triggering structure of the push switch of the electric lifting platform according to claim 5, characterized in that: There are vertical spring sleeves for accommodating their respective buffer springs inside the pressing cover.
7. The triggering structure of the push switch of the electric lifting platform according to claim 1, characterized in that: The sliding height dimension of the pressing cover in the vertical through hole is equal to 6 mm.
8. The triggering structure of the push switch of the electric lifting platform according to claim 1, characterized in that: There are multiple vertical sliders on both side plates of the pressing cover frame. There are multiple vertical slots on both side walls of the vertical through hole of the pressing switch box for the respective multiple vertical sliders to slide and be vertically limited, and the openings of the vertical slots face the pressing switch.