Switching box for measuring leakage current and patient auxiliary current

Abstract

The utility model discloses a switching box used for measuring leakage current and patient auxiliary current, comprising a switching box used for connecting a stimulator electrode and an electric leakage measuring instrument in a leakage current measuring process; the switching knob is rotationally connected to the switching box, and the switching knob is used for selecting different wave bands and different test modes; the switching box is provided with a box body and a switching hole formed in the box body, and the switching hole is respectively connected with the stimulator electrode and the electric leakage measuring instrument through switching wires; the retarding assembly is arranged between the switching box and the switching knob, and the retarding assembly is used for improving the retarding strength between the switching knob and the switching box; the blocking ball is arranged in the corresponding groove, so that the blocking ball can be accurately clamped into the corresponding groove all the time when the knob is switched at any gear, the gear drift risk caused by mechanical clearance or external vibration is eliminated, and the high precision of test mode selection and the operation stability are ensured.

Description

Technical Field

[0001] This utility model relates to the field of switching boxes, and more particularly to a switching box for measuring leakage current and patient auxiliary current. Background Technology

[0002] In the field of medical device safety testing, especially in the measurement of leakage current and patient auxiliary current in devices such as cardiac electrophysiological stimulators, the test switching box, as a core component for time-division multiplexing of multi-channel signals, directly affects the accuracy of test results due to the precision of its gear switching and operational stability. Traditional switching boxes generally employ a linear spring-loaded pin combined with a flat push plate, which presents significant technical bottlenecks: First, during the compression / rebound process, uneven force on the push plate contact surface can easily cause fluctuations in the knob's damping force, resulting in inconsistent rotational resistance. When the resistance is too low, the knob is prone to accidental gear slippage due to slight contact or equipment vibration, leading to incorrect test mode switching; when the resistance is too high, two-handed operation is required, easily causing operator fatigue and severely impacting testing efficiency. Second, the rigid contact structure between the metal pin and the push plate is prone to mechanical wear during frequent rotation. Long-term use not only exacerbates damping instability but also leads to contact misalignment or poor connection, causing test data drift and even the risk of equipment short circuits. In addition, existing switching boxes mostly adopt a single-channel serial test mode, which requires repeated plugging and unplugging of wiring to switch different electrode channels (such as output electrodes and sensing electrodes). The operation is cumbersome and prone to poor contact due to human error, making it difficult to meet the stringent requirements of efficiency and safety in medical testing scenarios.

[0003] Therefore, it is necessary to improve a switching box in the prior art for measuring leakage current and patient assist current in order to solve the above problems. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides a switching box for measuring leakage current and patient auxiliary current, aiming to solve the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a switching box for measuring leakage current and patient auxiliary current, comprising:

[0006] The switching box is used to connect the stimulator electrodes to the leakage current measuring instrument during leakage current measurement.

[0007] An adapter knob, which is connected to the switching box, is used to select different bands and test modes; and...

[0008] A damping component is disposed between the switching box and the adapter knob. The damping component is used to increase the damping strength between the adapter knob and the switching box.

[0009] In a preferred embodiment of this utility model, the switching box has a box body and an adapter hole disposed on the box body. The adapter hole is connected to the stimulator electrode and the leakage current measuring instrument respectively through an adapter cable.

[0010] In a preferred embodiment of this utility model, the switching box has a plurality of placement holes evenly provided on its inner side, and the blocking component is disposed in the placement holes.

[0011] In a preferred embodiment of this utility model, a plurality of blocking grooves are evenly provided at the bottom of the adapter knob, each blocking groove being arranged in a one-fifth circle, and there are stacked portions on both sides of the plurality of blocking grooves symmetrically.

[0012] In a preferred embodiment of this utility model, the placement hole is a stepped cylindrical hole. The placement hole is through-hole at one end near the blocking groove and is a four-fifths circle. One placement hole and one blocking groove are spliced ​​together to form a complete spherical groove.

[0013] In a preferred embodiment of the present invention, the blocking component has a blocking ball and a pin disposed at the bottom of the blocking ball; a spring is sleeved on the pin, and the two ends of the spring are fixedly connected to the pin and the placement groove respectively.

[0014] In a preferred embodiment of the present invention, the ejector pin includes a push plate and a push rod fixedly connected to the push plate; the push plate is slidably connected to the discharge hole.

[0015] In a preferred embodiment of this invention, the diameter of the placement hole is the same as the diameter of the dam, and the dam is the same as the spherical groove.

[0016] In a preferred embodiment of this utility model, the push plate is conical in shape, the top of the push plate is arc-shaped, the push plate is slidably connected to the placement hole, and the bottom of the push rod is circular in shape and slidably connected to the placement hole.

[0017] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0018] (1) This utility model provides a switching box for measuring leakage current and patient auxiliary current. It uses a matching technique between the one-fifth circular resistance groove at the bottom of the adapter knob and the arc surface of the four-fifths circular through-hole at the end of the stepped placement hole of the switching box to splice the two into a complete hemispherical groove, the curvature of which is strictly consistent with the radius of the resistance ball. When the knob is rotated to the target position, the resistance ball is precisely embedded in the groove under the action of the spring. Through mechanical limiting, the problem of position positioning deviation caused by processing errors or contact gaps in traditional band switches is solved, achieving zero-deviation positioning for position switching. Simultaneously, a stacked resistance groove design is adopted, with an independent non-stacked area reserved in the middle 1 / 3 section of multiple resistance grooves and stacked areas set on both sides. This ensures that the resistance ball can always accurately engage in the corresponding groove when the knob switches to any position, eliminating the risk of position drift caused by mechanical gaps or external vibrations, and ensuring high accuracy and operational stability in test mode selection.

[0019] (2) This utility model provides a switching box for measuring leakage current and patient auxiliary current. Through a double-layered stepped cylindrical hole design that works in conjunction with the conical structure of the ejector pin plate, an enlarged placement hole is provided near the adapter knob, ensuring uniform force distribution during spring compression and rebound. Simultaneously, by sleeved the spring on the outside of the ejector pin rod and adjusting its damping coefficient, a constant rotational resistance is formed. This technical approach solves the problem of knob resistance fluctuation caused by uneven spring force in traditional switching boxes. It avoids accidental gear switching caused by the knob sliding due to insufficient resistance and eliminates operational fatigue caused by excessive resistance, ultimately achieving precise damping control and stable gear maintenance of the knob during single-handed operation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the switching box according to a preferred embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the blocking component structure of a preferred embodiment of the present invention;

[0024] In the diagram: 1. Switch box; 10. Placement hole; 11. Adapter hole; 2. Adapter knob; 20. Blocking groove; 3. Blocking assembly; 30. Blocking ball; 31. Ejector pin; 32. Spring. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0026] As shown in the figure, a switching box for measuring leakage current and patient auxiliary current includes:

[0027] Switching box 1 is used to connect the stimulator electrodes and the leakage current measuring instrument during the leakage current measurement process.

[0028] In this utility model, the switching box 1 has a box body and an adapter hole 11 disposed on the box body. The adapter hole 11 is connected to the stimulator electrode and the leakage current measuring instrument respectively through the adapter wire. The switching box 1 has a plurality of placement holes 10 evenly opened on the inner side, and the blocking component 3 is disposed in the placement hole 10.

[0029] It should be noted that the switching box 1 is mainly used to connect the stimulator electrodes to the leakage current measuring instrument during leakage current measurement, so as to accurately and conveniently test the patient leakage current of different application parts. Through the switching box 1, the leakage current of different output electrodes and sensing electrodes of the stimulator can be tested separately to ensure that the safety of the stimulator meets relevant standards. When connecting the stimulator electrodes, the corresponding adapter wires of the stimulator electrodes and the switching box 1 are connected to ensure a stable and reliable connection. When connecting the leakage current measuring instrument, the "patient" terminal on the switching box 1 is connected to the "patient" terminal of the leakage current measuring instrument so that the patient leakage current can be measured.

[0030] Adapter knob 2 is rotatably connected to switching box 1. Adapter knob 2 is used to select different bands and different test modes; and...

[0031] In this utility model, the bottom of the adapter knob 2 is evenly provided with a plurality of blocking grooves 20, each blocking groove 20 is arranged in a one-fifth circle, and there are stacked parts on both sides of the plurality of blocking grooves 20 symmetrically; the placement hole 10 is arranged in a stepped cylindrical hole, the placement hole 10 is arranged through one end near the blocking groove 20, and is arranged in a four-fifth circle, and one placement hole 10 and one blocking groove 20 are spliced ​​together to form a complete spherical groove.

[0032] It should be noted that the band switch is located on the switching box 1, which is also known as the adapter knob 2, and is used to select different test modes or test sections. The patient leakage current of different application parts can be tested through the adapter knob 2. The adapter knob 2 is rotatably connected to the switching box 1. Different modes or different bands can be adjusted and selected by rotating the adapter knob 2. Eight placement holes 10 are evenly arranged in the switching box 1. The placement holes 10 are set in a stepped cylindrical hole. There are two layers of stepped placement holes 10. The holes gradually increase in size from the end away from the adapter knob 2 to the end closer to the adapter knob 2. That is, the layer closer to the adapter knob 2 is larger than the layer away from the adapter knob 2. At the end of the layer closer to the adapter knob 2, a four-fifths circle penetrates through the adapter box. This creates an inward concave arc at the penetration point of the placement hole 10. This allows the damping component 3 to provide damping to the adapter knob 2 while avoiding damage to the adapter knob 2 caused by the continuous upward pressure of the damping component 3.

[0033] A plurality of blocking grooves 20 are evenly provided on the side of the adapter knob 2 near the placement hole 10. The blocking grooves 20 and the placement hole 10 are located on the same ring, so that when the adapter knob 2 is rotated, the blocking grooves 20 and the placement hole 10 can be aligned. The end four-fifths of the blocking grooves 20 and the placement hole 10 can be spliced ​​together to form a complete hemispherical arc, and the radius of the hemispherical arc is the same as that of the blocking ball 30 of the blocking component 3. A plurality of blocking grooves 20 are provided, and the blocking grooves 20 are partially stacked on the adapter knob 2. Only the middle third of the blocking grooves 20 is not stacked, while the left and right sides are stacked. This allows the blocking ball 30 to be locked into different blocking grooves 20 when the adapter knob 2 is rotated to any specified position and specified frequency band.

[0034] The blocking component 3 is disposed between the switching box 1 and the adapter knob 2. The blocking component 3 is used to increase the blocking strength between the adapter knob 2 and the switching box 1.

[0035] In this utility model, the blocking component 3 has a blocking ball 30 and a pin 31 disposed at the bottom of the blocking ball 30; a spring 32 is sleeved on the pin 31, and the two ends of the spring 32 are respectively fixedly connected to the pin 31 and the placement groove.

[0036] The ejector pin 31 includes a push plate and a push rod fixedly connected to the push plate;

[0037] The push plate is slidably connected to the placement hole; the diameter of the placement hole 10 is the same as the diameter of the hindrance ball 30, and the hindrance ball 30 is the same as the spherical groove; the push plate is conical, the top of the push plate is arc-shaped, the push plate is slidably connected to the placement hole 10, and the bottom of the push rod is circular and slidably connected to the placement hole 10.

[0038] It should be noted that the blocking component 3 includes a blocking ball 30, a push pin 31, and a spring 32. The spring 32 is located in the placement hole 10 near the adapter knob 2. The spring 32 is sleeved on the outer circumference of the push pin 31. The push pin 31 includes a push plate and a push rod. Both the push rod and the push plate are slidably connected in the placement hole 10. The spring 32 is sleeved on the outer circumference of the push rod. As the adapter knob 2 rotates, it compresses the adapter knob 2. When the spring 32 is compressed and moves to the designated position, the blocking ball 30 falls into the blocking groove 20, and the spring 32 returns to its original deformation, thereby blocking the adapter knob 2 and preventing accidental activation of the adapter knob 2 during use.

[0039] The switching box is mainly used to connect the stimulator electrodes to the leakage current measuring instrument during leakage current measurement, enabling accurate and convenient testing of patient leakage current in different application areas. The switching box allows for separate testing of the leakage current of different output electrodes and sensing electrodes of the stimulator, ensuring the stimulator's safety meets relevant standards. During use, connect the corresponding port of the switching box to the corresponding port of the leakage current measuring instrument, ensuring correct connection. Rotate the band switch (adapter knob) on the switching box to select the application area or mode to be tested. Then press the start button on the leakage current measuring instrument to perform the leakage current test. Based on the display results of the leakage current measuring instrument, determine whether the stimulator's leakage current meets relevant standards. If the PASS light is on, it indicates compliance with standards; if the NG light is on, it indicates non-compliance with standards, requiring further inspection or repair.

[0040] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A switching box for measuring leakage current and patient auxiliary current, characterized in that, include: Switching box (1), the switching box (1) is used to connect the stimulator electrode and the leakage current measuring instrument during the leakage current measurement process; A transition knob (2) is rotatably connected to the switching box (1), and the transition knob (2) is used to select different bands and different test modes; and, The blocking component (3) is disposed between the switching box (1) and the adapter knob (2), and the blocking component (3) is used to increase the blocking strength between the adapter knob (2) and the switching box (1).

2. A switching box for measuring leakage current and patient auxiliary current according to claim 1, characterized in that: The switching box (1) has a box body and an adapter hole (11) provided on the box body. The adapter hole (11) is connected to the stimulator electrode and the leakage current measuring instrument respectively through the adapter wire.

3. A switching box for measuring leakage current and patient auxiliary current according to claim 1, characterized in that: The switching box (1) has several placement holes (10) evenly opened on its inner side, and the blocking component (3) is disposed in the placement hole (10).

4. A switching box for measuring leakage current and patient auxiliary current according to claim 3, characterized in that: The bottom of the adapter knob (2) is evenly provided with several blocking grooves (20), each blocking groove (20) is arranged in a fifth circle, and there are stacked parts on both sides of the several blocking grooves (20).

5. A switching box for measuring leakage current and patient auxiliary current according to claim 4, characterized in that: The placement hole (10) is a stepped cylindrical hole. The placement hole (10) is through-hole at one end near the blocking groove (20) and is a four-fifths circle. One placement hole (10) and one blocking groove (20) are spliced ​​together to form a complete spherical groove.

6. A switching box for measuring leakage current and patient auxiliary current according to claim 5, characterized in that: The blocking component (3) has a blocking ball (30) and a pin (31) disposed at the bottom of the blocking ball (30); a spring (32) is sleeved on the pin (31), and the two ends of the spring (32) are fixedly connected to the pin (31) and the placement hole, respectively.

7. A switching box for measuring leakage current and patient auxiliary current according to claim 6, characterized in that: The ejector pin (31) includes a push plate and a push rod fixedly connected to the push plate; The push plate is slidably connected to the placement hole.

8. A switching box for measuring leakage current and patient auxiliary current according to claim 7, characterized in that: The diameter of the placement hole (10) is the same as the diameter of the stabilizing ball (30), and the stabilizing ball (30) is the same as the spherical groove.

9. A switching box for measuring leakage current and patient auxiliary current according to claim 7, characterized in that: The push plate is conical in shape, the top of the push plate is arc-shaped, the push plate is slidably connected to the placement hole (10), and the bottom of the push rod is circular in shape and is slidably connected to the placement hole (10).

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