A rocker switch for medical equipment

Abstract

This utility model discloses a rocker switch specifically for medical devices. Through the cooperation of an arc-shaped guide post with a guide hole on the second linkage part and the cooperation of a positioning ring on the first linkage part with a stationary contact, a forced and precise guiding path is provided for the rotational movement of the moving contact. This avoids the gradual deviation of the motion trajectory caused by fulcrum gaps or deformation in traditional designs, ensuring that after each action, the moving contact can accurately and repeatedly move to a position completely aligned with the stationary contact. This allows the effective conductive contact area of ​​the switch to remain stable and reliable even after long-term use, significantly reducing the frequency and intensity of harmful arc discharges during contact opening and closing, significantly extending the electrical and mechanical life of the contacts, and avoiding a vicious cycle and switch failure caused by contact deterioration. This provides a higher level of safety and operational reliability for medical devices, meeting the stringent requirements of the medical field for key human-machine interface control components.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, specifically to a rocker switch for medical equipment. Background Technology

[0002] Rocker switches have wide applications in various fields, commonly used as power switches in electronic devices. They are widely used in household appliances, industrial equipment, and electronic circuits. A rocker switch is a mechanical power control element designed based on the lever principle, which switches the circuit on and off by opening and closing a group of contacts. Rocker switches achieve switching states through physical rocking, requiring little operating force and offering fast response, making them suitable for scenarios requiring frequent on / off switching.

[0003] In the field of precision medical equipment, rocker switches, as key human-machine interface control components, directly affect the safety and reliability of clinical diagnosis and treatment due to their mechanical durability. Especially in continuous operation scenarios such as life support equipment, high-frequency electrosurgical units, and ventilators, the switch components must withstand more than 500,000 mechanical cycle tests, placing stringent requirements on the structural stability of the contact system. Existing rocker switches in medical equipment suffer from the following technical bottlenecks: Under long-term, high-frequency operation, the contact area between the moving and stationary contacts of the rocker switch undergoes a gradual mechanical shift. This is mainly due to a significant offset at the fulcrum connection point of the moving contact on the base, causing the moving contact's trajectory to deviate from the theoretical contact trajectory when the switch is toggled, thus reducing the effective contact area between the moving and stationary contacts. When the effective conductive area of ​​the contact interface decreases by more than 30%, the contact resistance will surge to 5 to 8 times its initial value, causing local temperature rises exceeding the IEC 60601 medical electrical standard limit (△T≤25K). More seriously, the arcing caused by poor contact can burn the contact surface, creating a vicious cycle that ultimately leads to the failure of the switch function. In medical settings, such malfunctions can directly cause unexpected equipment shutdowns, abnormal parameter outputs, or false triggering of protection mechanisms. Especially in high-risk environments such as operating rooms and intensive care units, this can lead to irreversible clinical consequences.

[0004] In view of this, there is an urgent need to design a rocker switch specifically for medical devices to avoid the defect of poor contact that occurs after long-term high-frequency use of rocker switches. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a rocker switch specifically for medical devices, comprising a base, a housing connected to the base, and a rocker button rotatably connected to the housing. A contact assembly is connected to the base, and an actuating assembly is connected to the rocker button. The contact assembly and the actuating assembly are linked. The contact assembly includes a first stationary contact, a second stationary contact, and a moving contact. Both the first and second stationary contacts are connected to the base. The first stationary contact includes a horizontally arranged bent portion with a stationary contact point connected to it. The second stationary contact includes a vertically arranged support portion. The moving contact includes an actuating portion, with a first linkage portion and a second linkage portion respectively at its two ends. The moving contact has a moving contact point on the side of the first linkage portion closer to the stationary contact point. A positioning ring adapted to the stationary contact point is provided on the outer periphery of the moving contact. A guide hole is provided on the second linkage portion. A positioning platform is provided on the base corresponding to the position of the second linkage portion, and an arc-shaped guide post is provided on the positioning platform, connected within the guide hole.

[0006] The present invention is further configured such that a support groove is provided on the support part, and limiting angles are provided on both sides of the support groove. A fulcrum part is provided in the middle of the function part, and limiting grooves are provided on both sides of the fulcrum part directly opposite the limiting angles. The fulcrum part is connected in the support groove, and the limiting angles are connected in the limiting grooves.

[0007] The present invention is further configured such that the side of the actuating part near the toggle assembly is arc-shaped.

[0008] The present invention is further configured such that the arc-shaped guide post is adapted to the guide hole, and the size of the positioning platform is larger than the size of the guide hole.

[0009] The present invention is further configured such that the inner wall of the positioning ring near the bent portion is an annular wire inclined surface, and the height of the positioning ring is greater than the height of the moving contact and less than the sum of the heights of the moving contact and the stationary contact.

[0010] The present invention is further configured such that the first stationary contact includes a first pin portion, the first pin portion is perpendicular to the bending portion, the second stationary contact includes a second pin portion, and a connecting portion is connected between the second pin portion and the support portion; the base is provided with a first slot and a second slot, the first pin portion is connected in the first slot, and the second pin portion is connected in the second slot.

[0011] The present invention is further provided with anti-detachment hooks on both sides of the first pin and the second pin.

[0012] The present invention is further configured such that the toggle assembly includes a spring and a driving member, and the rocker button is provided with a toggle tube on the side near the moving contact. The spring and the driving member are both connected inside the toggle tube. One end of the spring abuts against the rocker button, and the other end of the spring abuts against the driving member. The driving member extends to the outside of the toggle tube and abuts against the actuating part.

[0013] The present invention is further configured such that the first stationary contact, the second stationary contact, and the moving contact are all integrally stamped, the stationary contact is welded to the bent portion, and the moving contact is welded to the first linkage portion.

[0014] The present invention is further configured such that both the contact assembly and the toggle assembly are provided with at least two sets.

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages: The operating mode of the rocker switch for medical equipment in this technical solution is as follows: The rocker switch is installed on the equipment, and the first and second stationary contacts are connected to the equipment circuit. When the rocker switch is in the open state, the second linkage part abuts against the positioning table, and the moving contact of the first linkage part separates from the stationary contact of the bent part. When the rocker switch switches from the open state to the on state, the toggle assembly drives the action part to rotate around the support part as the fulcrum. During the rotation, the arc-shaped guide post always passes through the guide hole of the second linkage part, providing guidance for the rotation of the moving contact. The first linkage part moves closer to the bent part, so that the moving contact and the stationary contact are in contact. The moving contact moves according to the target motion trajectory during the on and off process of the rocker switch. At the same time, the positioning ring provides an auxiliary correction function before the moving contact and the stationary contact make contact, ensuring the effective contact area between the moving contact and the stationary contact.

[0016] This technical solution for medical device rocker switches provides a forced and precise guiding path for the rotational movement of the moving contact through the cooperation of the arc-shaped guide post with the guide hole on the second linkage part and the cooperation of the positioning ring on the first linkage part with the stationary contact. This avoids the gradual deviation of the movement trajectory caused by the fulcrum gap or deformation in traditional designs, ensuring that after each action, the moving contact can accurately and repeatedly move to the position completely aligned with the stationary contact, so that the effective conductive contact area of ​​the switch can remain stable and reliable even after long-term use.

[0017] Based on the connection stability of the rocker switch's moving and stationary contacts, the frequency and intensity of harmful arc discharge generated during the opening and closing of the contacts are greatly reduced. This reduces oxidation, erosion, and carbonization of the contact surface caused by arc burns, significantly extending the electrical and mechanical life of the contacts. It avoids the vicious cycle and switch failure caused by contact deterioration, providing a higher level of safety and operational reliability for medical equipment and meeting the stringent requirements of the medical field for key human-machine interaction control components. Attached Figure Description

[0018] Figure 1 This is a perspective view of a rocker switch according to an embodiment of the present invention.

[0019] Figure 2 This is an exploded view of a rocker switch according to an embodiment of the present invention.

[0020] Figure 3 This is a front view of a rocker switch according to an embodiment of the present invention.

[0021] Figure 4 for Figure 3 Sectional view of AA.

[0022] Figure 5 This is a schematic diagram of the contact connection of the rocker switch in the energized state according to an embodiment of the present invention.

[0023] Figure 6 This is a perspective view of the base according to an embodiment of the present utility model.

[0024] Figure 7 This is a perspective view of the contact assembly according to an embodiment of the present utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Combined with appendix Figure 1 To be continued Figure 7This utility model provides a rocker switch specifically for medical devices, comprising a base 1, a housing 2 connected to the base 1, and a rocker button 3 rotatably connected to the housing 2. A contact assembly 4 is connected to the base 1, and a toggle assembly 5 is connected to the rocker button 3. The contact assembly 4 and the toggle assembly 5 are linked together. The contact assembly 4 includes a first stationary contact 41, a second stationary contact 42, and a moving contact 43. Both the first stationary contact 41 and the second stationary contact 42 are connected to the base 1. The first stationary contact 41 includes a horizontally arranged bent portion 411, on which a stationary contact 412 is connected. The second stationary contact 41... The stationary contact 42 includes a vertically arranged support portion 421, and the moving contact 43 includes an action portion 431. The two ends of the action portion 431 are respectively provided with a first linkage portion 432 and a second linkage portion 433. The first linkage portion 432 is provided with a moving contact 434 on the side near the stationary contact 412. The outer periphery of the moving contact 434 is provided with a positioning ring 435 adapted to the stationary contact 412. The second linkage portion 433 is provided with a guide hole 436. The base 1 is provided with a positioning platform 11 corresponding to the position of the second linkage portion 433. The positioning platform 11 is provided with an arc-shaped guide post 12, and the arc-shaped guide post 12 is connected in the guide hole 436.

[0027] In this embodiment, the horizontal orientation of the bending portion 411 and the vertical orientation of the support portion 421 are both relative to the base 1.

[0028] In this embodiment, when the rocker switch is in the off and on states, the arc-shaped guide post 12 is always connected to the guide hole 436, so that the moving contact 43 moves according to the target motion trajectory during rotation.

[0029] In this embodiment, the rocker switch for medical devices operates as follows: the rocker switch is installed on the device, and the first stationary contact 41 and the second stationary contact 42 are connected to the device circuit. When the rocker switch is in the off state, the second linkage part 433 abuts against the positioning platform 11, and the moving contact 434 of the first linkage part 432 separates from the stationary contact 412 of the bending part 411. When the rocker switch switches from the off state to the on state, the toggle assembly 5 drives the actuating part to rotate around the support part 421 as the fulcrum. During the rotation process, the arc-shaped guide post 12 always passes through the guide hole 436 of the second linkage part 433, providing guidance for the rotation of the moving contact 43. The first linkage part 432 moves closer to the bending part 411, so that the moving contact 434 fits with the stationary contact 412. The moving contact moves according to the target motion trajectory during the opening and closing of the rocker switch. At the same time, the positioning ring 435 provides an auxiliary correction function before the moving contact 434 contacts the stationary contact 412, ensuring the effective contact area between the moving contact 434 and the stationary contact 412.

[0030] In this embodiment, as shown in the appendix Figure 7 As shown, the support part 421 has a support groove 422, and the two sides of the support groove 422 have limiting angles 423. The middle part of the action part 431 has a fulcrum part 437, and the two sides of the fulcrum part 437 are provided with limiting grooves 438 opposite to the limiting angles 423. The fulcrum part 437 is connected in the support groove 422, and the limiting angles 423 are connected in the limiting grooves 438. This structure can effectively prevent the moving contact 43 from shifting in the horizontal direction.

[0031] In this embodiment, as shown in the appendix Figure 7 As shown, the side of the actuating part 431 near the toggle assembly 5 is arc-shaped, which makes the toggle assembly 5 slide more smoothly when the actuating part 431 slides to switch the rocker switch.

[0032] In this embodiment, as shown in the appendix Figure 5 and attached Figure 7 As shown, the arc-shaped guide post 12 is adapted to the guide hole 436, and the size of the positioning platform 11 is larger than the size of the guide hole 436. When the rocker switch is in the open state, the second linkage part 433 abuts against the positioning platform 11, so that the moving contact 43 changes its stroke symmetrically in the switching state.

[0033] In this embodiment, as shown in the appendix Figure 5 As shown, the inner wall of the positioning ring 435 near the bent portion 411 has an annular wire inclined surface 439. The height of the positioning ring 435 is greater than the height of the moving contact 434 but less than the sum of the heights of the moving contact 434 and the stationary contact 412. The size of the positioning ring 435 is such that when the rocker switch is switched to ON, if there is a misalignment between the moving contact 434 and the stationary contact 412, the annular wire inclined surface 439 will adaptively adjust itself after contacting the stationary contact 412 to help the moving contact 434 and the stationary contact 412 fit more closely, thereby increasing the effective electrical contact area.

[0034] In this embodiment, as shown in the appendix Figure 1 and attached Figure 7 As shown, the first stationary contact 41 includes a first pin portion 413, which is perpendicular to the bent portion 411. The second stationary contact 42 includes a second pin portion 424, and a connecting portion 425 connects the second pin portion 424 and the support portion 421. The base 1 has a first slot 13 and a second slot 14, with the first pin portion 413 connected to the first slot 13 and the second pin portion 424 connected to the second slot 14.

[0035] In this embodiment, as shown in the appendix Figure 7As shown, the first plug portion 413 is provided with a first anti-detachment barb 414 on both sides, and the second plug portion 424 is provided with a second anti-detachment barb 426 on both sides. The first anti-detachment barb 414 and the second anti-detachment barb 426 ensure the connection stability of the first plug portion 413 and the second plug portion 424 on the base 1.

[0036] In this embodiment, as shown in the appendix Figure 4 As shown, the toggle assembly 5 includes a spring 51 and a drive member 52. The rocker button 3 has a toggle tube 31 on the side near the moving contact 43. The spring 51 and the drive member 52 are both connected inside the toggle tube 31. One end of the spring 51 abuts against the rocker button 3, and the other end of the spring 51 abuts against the drive member 52. The drive member 52 extends to the outside of the toggle tube 31 and abuts against the actuating part 431.

[0037] In this embodiment, the first stationary contact 41, the second stationary contact 42, and the moving contact 43 are all integrally stamped. The stationary contact 412 is welded to the bent portion 411, and the moving contact 434 is welded to the first linkage portion 432.

[0038] In this embodiment, as shown in the appendix Figure 2 As shown, both the contact assembly 4 and the toggle assembly 5 are provided with at least two sets. The rocker switches can be connected in parallel to control the same circuit, thereby improving the switching control reliability of the rocker switches.

[0039] In this embodiment, the cooperation between the arc-shaped guide post 12 of the medical device-specific rocker switch and the guide hole 436 on the second linkage part 433, as well as the cooperation between the positioning ring 435 on the first linkage part 432 and the stationary contact 412, provides a forced and precise guide path for the rotational movement of the moving contact 43. This avoids the gradual deviation of the movement trajectory caused by the fulcrum gap or deformation in traditional designs, ensuring that after each action, the moving contact 434 can accurately and repeatedly move to the position completely aligned with the stationary contact, so that the effective conductive contact area of ​​the switch can remain stable and reliable after long-term use.

[0040] Based on the connection stability of the rocker switch's moving and stationary contacts, the frequency and intensity of harmful arc discharge generated during the opening and closing of the contacts are greatly reduced. This reduces oxidation, erosion, and carbonization of the contact surface caused by arc burns, significantly extending the electrical and mechanical life of the contacts. It avoids the vicious cycle and switch failure caused by contact deterioration, providing a higher level of safety and operational reliability for medical equipment and meeting the stringent requirements of the medical field for key human-machine interaction control components.

[0041] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rocker switch for medical devices, comprising a base, a housing connected to the base, and a rocker button rotatably connected to the housing, wherein a contact assembly is connected to the base, and an actuating assembly is connected to the rocker button, the contact assembly and the actuating assembly being linked together, characterized in that... The contact assembly includes a first stationary contact, a second stationary contact, and a moving contact. Both the first and second stationary contacts are connected to the base. The first stationary contact includes a horizontally arranged bent portion with a stationary contact point connected to it. The second stationary contact includes a vertically arranged support portion. The moving contact includes an action portion with a first linkage portion and a second linkage portion at its two ends. The first linkage portion has a moving contact point on its side near the stationary contact point. The outer periphery of the moving contact point has a positioning ring adapted to the stationary contact point. The second linkage portion has a guide hole. The base has a positioning platform corresponding to the position of the second linkage portion, and the positioning platform has an arc-shaped guide post connected to the guide hole.

2. A medical device specific rocker switch according to claim 1, characterized in that The support part has a support groove, and the two sides of the support groove have limiting angles. The middle part of the function part has a fulcrum part, and the two sides of the fulcrum part are provided with limiting grooves opposite to the limiting angles. The fulcrum part is connected in the support groove, and the limiting angle is connected in the limiting groove.

3. A medical device specific rocker switch according to claim 2, wherein, The side of the actuating part closest to the toggle assembly is curved.

4. The medical device dedicated rocker switch of claim 1, wherein, The arc-shaped guide post is adapted to the guide hole, and the size of the positioning platform is larger than the size of the guide hole.

5. The medical device dedicated rocker switch of claim 1, wherein, The inner wall of the positioning ring near the bent portion has an annular wire slope. The height of the positioning ring is greater than the height of the moving contact and less than the sum of the heights of the moving contact and the stationary contact.

6. A medical device specific rocker switch according to any one of claims 1 to 5, characterized in that The first stationary contact includes a first pin portion, which is perpendicular to the bent portion. The second stationary contact includes a second pin portion, and a connecting portion is provided between the second pin portion and the support portion. The base has a first slot and a second slot, with the first pin portion connected to the first slot and the second pin portion connected to the second slot.

7. A medical device specific rocker switch according to claim 6, wherein, Both sides of the first and second pins are provided with anti-detachment hooks.

8. A medical device specific rocker switch according to any one of claims 1 to 5, wherein, The toggle assembly includes a spring and a drive member. The rocker button has a toggle tube on the side near the moving contact. The spring and the drive member are both connected inside the toggle tube. One end of the spring abuts against the rocker button, and the other end of the spring abuts against the drive member. The drive member extends to the outside of the toggle tube and abuts against the actuating part.

9. A rocker switch for medical devices according to any one of claims 1 to 5, characterized in that, The first stationary contact, the second stationary contact, and the moving contact are all integrally stamped. The stationary contact is welded to the bent portion, and the moving contact is welded to the first linkage portion.

10. A medical device specific rocker switch according to any one of claims 1 to 5, wherein, Both the contact assembly and the toggle assembly are provided with at least two sets.

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