Metal test probe integrated with force measurement function

Abstract

The invention relates to the field of electrical product detection, in particular to the field of electrical machinery safety protection function detection, and more particularly relates to a metal test probe integrated with a force measurement function, which comprises a hollow metal cylinder and a handle, the hollow metal cylinder is composed of a plurality of metal rings which are seamlessly connected in sequence, and the metal test probe also comprises a plurality of force measurement devices. The problem that a metal test probe and a dynamometer are matched for use, a large enough reserved space is required, and testing cannot be performed in a small space or a narrow simulation environment is solved, and it is guaranteed that the metal test probe can perform a simulation experiment according to standard requirements. The technical effects of improving the detection efficiency and reducing the influence of manual operation on experimental results while testing according to national standard requirements are achieved, and the equipment integration technology progress and the inspection and detection standardization progress are promoted.

Description

Technical Field

[0001] This invention relates to the field of electrical product testing, particularly to the field of electrical machinery safety protection function testing, and more specifically to a metal test probe with integrated force measurement function. Background Art

[0002] Metal test probes are standardized testing tools designed according to standard IEC 61032 (Chinese standard GB / T 16842). Depending on the specific testing needs, they simulate the geometric features of human body parts or foreign objects to detect whether the openings, gaps, or movement trajectories of electrical products meet the requirements of the standard.

[0003] The No. 32 metal test probe has a rigid cylinder and a cylindrical nylon handle. The cylindrical nylon handle is fixedly connected to the rigid cylinder by a nylon baffle, and a mating hole is provided on the end face of the cylindrical nylon handle. Typically, the mating hole is a threaded hole. During the test, the force gauge's screw is inserted into the threaded hole to achieve a rigid connection between the force gauge and the No. 32 metal test probe. Then, the operator or mechanical device pushes the force gauge (push-pull force gauge) at a uniform speed to apply the standard-required pushing force to the test probe, observing whether the test probe can be inserted into a certain gap. Afterwards, a pulling force is applied, observing whether the test probe can be pulled out and the required pulling force value. By comparing the measured pushing and pulling force values ​​with the standard values ​​specified in the standard, it is determined whether the electrical appliance meets the standard requirements.

[0004] In this process, the metal test probe No. 32 serves only as a passive simulation testing tool. Force measurement requires the use of external devices such as a force gauge. However, in some tests, this device encountered problems with insufficient operating space.

[0005] For example, when testing electrical products such as range hoods (GB / T 4706.28—2024 Clause 20.101), the standard requires that if a component of a range hood or downdraft system can move automatically, there should be no risk of being pinched or injured. When the appliance is operating at rated voltage and the driven component is turned on and off, and the metal test probe No. 32 is placed over all potential pinch points within the width and height of the covering opening, if the driven component contacts the metal test probe No. 32, the force acting on the test probe should not exceed 100N.

[0006] However, the space left by the driving components of appliances such as range hoods when they are turned on or off is too small to meet the space requirements of the assembled experimental probe and force gauge.

[0007] Therefore, current technology is unable to perform simulated force tests in such confined spaces. Summary of the Invention

[0008] This invention addresses the problem in existing technologies that make it impossible to conduct simulated force tests, such as those involving a metal No. 32 test probe, within confined spaces.

[0009] This invention discloses a metal test probe with integrated force measurement function, comprising a hollow metal cylinder and a handle. The hollow metal cylinder is composed of multiple metal rings connected seamlessly in sequence, and also includes multiple force measuring devices. Each force measuring device includes a force sensor, a spring support, and a force value display screen. The spring support is fixed on both sides of the force sensor, and the end of the spring support is fixed to the inner wall of the metal ring. Each force sensor is arranged along the axial direction of the hollow metal cylinder. The handle also has a pre-drilled mounting hole for threaded engagement with a screw.

[0010] This invention is a structural modification based on metal test probes used in existing standards. These metal test probes can be gauge 32, 19, etc., as needed. Therefore, we have retained the basic structure of the test probe, such as the screw threaded mounting hole at the handle, to facilitate its use in combination with a force gauge.

[0011] What's special is that we cleverly achieved the determination of force in simulated tests, especially in confined spaces, by setting the metal cylinder in the existing metal test probe to a hollow structure and placing the force measuring device inside the hollow structure.

[0012] In one specific implementation, the force value display screen is located at the handle.

[0013] In one embodiment, a baffle is also included, which is disposed between the hollow metal cylinder and the handle. The baffle serves to limit the depth to which the metal cylinder penetrates into the mechanical structure under test, thereby better simulating the contact state between fingers or other limbs and the mechanical structure when a danger occurs.

[0014] The force value display and the force sensor can be connected by wire or wireless means. When it is a wired connection, in the scheme of setting a baffle, it can be understood that in order to ensure the connection between the force sensor and the force value display, a through hole is opened on the baffle for the signal line to pass through.

[0015] In one embodiment, the force measuring device corresponds one-to-one with the metal ring. That is, each section of the metal ring contains a force measuring device. Since the force-bearing metal surface is the surface in contact with the spring support in the force measuring device, the one-to-one correspondence between the force measuring device and the metal ring ensures that each segment of the hollow metal cylinder is within the measurement range of a specific force measuring device, thereby improving detection accuracy and preventing the omission of force values ​​at any point.

[0016] In one specific implementation, the hollow metal cylinder is composed of six seamlessly connected metal rings, with each metal ring corresponding to a force measuring device.

[0017] Given a fixed length, the number of metal rings determines the force-bearing area of ​​the force-bearing unit. Increasing the number of force-bearing units can improve the accuracy of the measurement, but sometimes these settings may be redundant. We need to find a suitable balance between accuracy and the number of units. For the length parameter of a No. 32 metal test probe, setting six metal rings to form six closely connected force-bearing units distributed along the axis is appropriate.

[0018] In one specific implementation, the force value display is oriented in the same direction as the spring support axis. This is done to make it easier to view the display readings during application.

[0019] This invention overcomes the problem of inaccurate force measurement caused by gravity and human operation when using metal test probes and force gauges in combination in existing technologies. It also solves the problem that using metal test probes and force gauges together requires a sufficiently large reserved space, making testing impossible in small spaces or confined simulated environments. Furthermore, this invention can simultaneously test multiple points under simulated conditions, effectively improving testing efficiency. Notably, this invention retains the original structural foundation for connecting to the force gauge, ensuring that the metal test probe can perform simulated experiments according to standard requirements. This achieves the technical effect of improving detection efficiency and reducing the impact of human operation on experimental results while meeting national standard requirements, thus promoting the advancement of equipment integration technology and the standardization of inspection and testing. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of a metal test probe with integrated force measurement function.

[0021] Figure 2 This is a cross-sectional view of the cylindrical metal part of a metal test probe that integrates force measurement functions, taken from another perspective.

[0022] Figure 3 A schematic diagram of the baffle for a metal test probe with integrated force measurement function. Detailed Implementation

[0023] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0024] like Figure 1 and Figure 2As shown, the metal test probe with integrated force measurement function includes a hollow metal cylinder 1 and a handle 2. The hollow metal cylinder is composed of multiple metal rings connected seamlessly in sequence, and also includes multiple force measuring devices. The force measuring devices include force sensors 3, spring supports 4, and force value display screens 5. The spring supports are fixed on both sides of the force sensors, and the ends of the spring supports are fixed to the inner sidewalls of the metal rings. Each force sensor is arranged along the axial direction of the hollow metal cylinder. The handle also has a pre-drilled mounting hole 6 for threaded engagement with the screw.

[0025] In this embodiment, we use a No. 32 metal test probe as an example. Combined with... Figure 1 As can be seen, the screw thread fitting mounting hole at the handle of the metal experimental probe can be used normally in combination with the force gauge.

[0026] like Figure 1 As shown, the force value display screen 5 is located at the handle 2.

[0027] In one embodiment, a baffle 7 is further included, which is disposed between the hollow metal cylinder and the handle. The baffle serves to limit the depth to which the metal cylinder penetrates into the mechanical structure under test, thereby better simulating the contact state between fingers or other limbs and the mechanical structure when a danger occurs.

[0028] In this embodiment, the force value display screen and the force sensor are connected wirelessly. If a wired connection is used, it is combined with... Figure 3 As can be seen, a through hole 8 is provided on the baffle for the signal line to pass through. Furthermore, since both the handle and the metal cylinder are hollow, wiring connections can be made.

[0029] like Figure 1 As shown, in this embodiment, the force measuring device corresponds one-to-one with the metal ring. That is, each section of the metal ring is equipped with a force measuring device. Since the force-bearing metal surface 9 is the surface in contact with the spring support in the force measuring device, the one-to-one correspondence between the force measuring device and the metal ring ensures that each segment of the hollow metal cylinder is within the measurement range of a certain force measuring device, thereby improving the detection accuracy and avoiding missing the force value at any point.

[0030] In this embodiment, the hollow metal cylinder is composed of six metal rings that are seamlessly connected in sequence, and each metal ring is equipped with a force measuring device.

[0031] like Figure 1 As shown, the force value display screen is oriented in the same direction as the spring support axis.

Claims

1. A metal test probe with integrated force measurement function, characterized in that: The device includes a hollow metal cylinder and a handle. The hollow metal cylinder is composed of multiple seamlessly connected metal rings and also includes multiple force measuring devices. Each force measuring device includes a force sensor, a spring support, and a force value display screen. The spring support is fixed on both sides of the force sensor, and the end of the spring support is fixed to the inner wall of the metal ring. Each force sensor is arranged along the axial direction of the hollow metal cylinder. The handle also has a pre-drilled mounting hole for threaded engagement with a screw.

2. The metal test probe with integrated force measurement function according to claim 1, characterized in that: The force value display screen is located on the handle.

3. The metal test probe with integrated force measurement function according to claim 1, characterized in that: It also includes a baffle, which is disposed between the hollow metal cylinder and the handle.

4. The metal test probe with integrated force measurement function according to claim 1, characterized in that: The force measuring device corresponds one-to-one with the metal ring.

5. The metal test probe with integrated force measurement function according to claim 1, characterized in that: The hollow metal cylinder is composed of six seamlessly connected metal rings, with a force measuring device corresponding to each metal ring.

6. The metal test probe with integrated force measurement function according to claim 1, characterized in that: The force value display screen is oriented in the same direction as the spring support axis.

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