TWM560012U - Dual sliding sleeve test rod - Google Patents

Abstract

The present invention is a test button of a push button, which comprises a sleeve, two end sleeves, a slide bar, two sliding sleeves, two compression springs, two return springs and a pressing head. The two ends of the sleeve are fixed to the two ends of the sleeve; the sliding rod is disposed in the sleeve and penetrates the two end sleeves and is spaced apart from the three sleeves and formed with an abutting portion; the two sliding sleeves are sleeved on the sliding rod and are located at abutting Both sides of the part are provided with steel balls at the same time and abut against the sliding rod and the sleeve; the two compression springs are located on both sides of the upper sliding sleeve, and the two return springs are located on both sides of the lower sliding sleeve. By creating a sliding sleeve and providing perforations in the wall of the sliding sleeve and placing steel balls inside, the sliding rod is indirectly abutted against the sleeve by the steel ball, and the end sleeve is spaced from the sliding rod, so that The slider, the steel ball and the sleeve can be moved to reduce the friction.

Description

Double slide test rod

This creation relates to a durability test device, and more particularly to a test lever for a push button.

3C products have become a part of modern life, and the durability of the items has become an index of competitive data for each brand. In keyboards, mice, and a variety of products that use push-buttons as the primary mode of operation, the life of the button, which is the maximum number of presses the button can withstand, is the best data to determine the durability of the product. The test method of the number of presses is to record the data by pressing the button of the machine to move the test rod up and down quickly and hit the product.

The test rod has a buffer structure with a striking force. Referring to FIG. 13, the test rod of the prior art has a sleeve 90, a rod 91, two sleeves 92, a spring 93, and a probe 94. The tube 90 is connected to the machine table and moves up and down with the machine table; the measuring rod 91 is relatively movably disposed in the sleeve 90, and the outer wall surface of the measuring rod 91 is surrounded by an abutting portion 911; the two sleeves 92 are fixedly fixed to The sleeve 90 is adjacent to both ends of the sleeve 90; the spring 93 abuts between the upper sleeve 92 and the abutting portion 911 of the spindle 91; the probe 94 is disposed at the bottom end of the spindle 91.

In use, the machine moves the entire test rod downward, and the probe 94 below the rod 91 hits and presses the button, and the rod 91 moves upward relative to the sleeve 90 due to the resilient force of the button itself during pressing, and Compression spring 93. This design can make the machine have a crushing mechanism after the end of the stroke of the button without damaging the keyboard, and can also test the resilience of the button by changing the preload or spring force of the spring 93, but because of its own The structural design makes the performance of the test rod in the prior art slightly discounted due to the following disadvantages.

First, the outer wall surface of the measuring rod 91 abuts against the inner wall surface of the two sleeves 92 to be coaxial with the sleeve 90. Such a design may cause the movement to be unsmooth due to the frictional force, and the wear time may cause wear after being elongated. Its own durability problem.

Secondly, the spring 93 may have a slight yaw during the compression process, thereby rubbing the inner wall surface of the sleeve 90 and the measuring rod 91 to cause wear and tear, and the longer the length of the spring 93, the greater the yaw amplitude. .

In view of the shortcomings and deficiencies of the prior art described above, the present invention provides a double-sleeve test rod that changes the sliding movement to a rolling movement and changes the longer single spring to a shorter multiple spring to reduce the spring during compression. Left and right yaw.

In order to achieve the above-mentioned creative purposes, the technical means adopted in this creation is to design a double-sleeve test rod, which comprises: a sleeve, the two ends of the sleeve are respectively an upper end opening and a lower end opening; , both of which are tubular and are fixedly disposed in the sleeve. The two end sleeves are respectively an upper end sleeve and a lower end sleeve, the upper end sleeve is located at the upper end opening of the sleeve, and the lower end sleeve is located at the sleeve. The lower end opening; a sliding rod movably disposed in the sleeve, the sliding rod penetrating the end sleeve, the outer wall surface of the sliding rod is spaced apart from the inner wall surface of the end sleeve, the sliding rod The outer wall surface is formed with an abutting portion, and the outer wall surface of the abutting portion is spaced from the inner wall surface of the sleeve; the two sliding sleeves are movably disposed in the sleeve, and The sliding sleeve is disposed outside the sliding rod, and the two sliding sleeves are respectively an upper sliding sleeve and a sliding sleeve. The upper sliding sleeve is located between the upper end opening and the abutting portion, and the sliding sleeve is located at the lower end opening and the sliding sleeve Between the abutting portions; the pipe wall of each sliding sleeve is provided with a plurality of perforating groups, The perforated groups are arranged along the axial direction of the sliding sleeve, each of the perforating groups includes at least three perforations, and each of the perforations is rollably provided with a steel ball, and each of the steel balls simultaneously abuts the sliding rod and the sleeve; a compression spring, which is disposed in the sleeve and sleeved outside the sliding rod, the two compression springs are respectively a first compression spring and a second compression spring, and the two ends of the first compression spring respectively abut The upper end sleeve and the upper sliding sleeve, the two ends of the second compression spring respectively abut against the upper sliding sleeve and the abutting portion of the sliding rod; the two return springs are disposed in the sleeve and are sleeved The two return springs are respectively a first return spring and a second return spring, and the two ends of the first return spring are respectively fixed to the abutting portion of the slide bar and the sliding sleeve, The two ends of the second return spring are respectively fixed to the sliding sleeve and the lower end sleeve; a pressing head is disposed at the bottom end of the sliding rod and located outside the sleeve.

The advantage of this creation is that by adding the design of the sliding sleeve, and providing perforations in the wall of the sliding sleeve and placing steel balls inside, the sliding rod is abutted against the steel balls in the sliding sleeve and indirectly abuts by the steel balls. The inner wall surface of the sleeve, thereby keeping the sliding rod coaxial with the sleeve and moving relative to each other, so that the inner wall surface of the end sleeve and the outer wall surface of the sliding rod are spaced apart, so that the sliding rod does not move during the movement It is in contact with the end sleeve so that there is no problem of friction, and the most important point is that the steel ball can be rotated and placed on the sliding sleeve, so that the sliding rod, the steel ball in the sliding sleeve and the casing can be made. The rolling movement mode is maintained, the friction is greatly reduced, the overall smoothness is greatly improved during use, and the consumption due to friction is greatly reduced. In addition, this design uses a multi-stage spring design to replace the old long spring, reducing the length of the spring, reducing the left and right yaw during compression, and further increasing the overall smoothness and durability.

Further, the double-sleeve test rod further includes a load adjusting member that connects the sleeve and the slide bar and adjusts an axial position of the slide bar in the sleeve.

Further, the double-sleeve test rod, wherein an outer wall surface of the sliding rod is externally threaded adjacent to the upper end sleeve, the load adjusting member is tubular and has an internal thread, and the load adjusting member is provided with a screw In addition to the slide bar, the load adjustment member is positioned above the sleeve and selectively abuts against the top end of the sleeve.

Further, the double-sleeve test rod further includes a rubber ring sleeved outside the slide bar and located between the load adjusting member and the upper end sleeve.

Further, the double-sleeve test rod further includes an outer spring sleeved outside the sliding rod, and the two ends of the outer spring respectively abut against the lower end sleeve and the pressing head.

Further, the double-sleeve test rod, wherein: the upper end sleeve is open at one end of the sleeve and protrudes to form a flange, and the first compression spring is sleeved on the flange; the upper sleeve is sleeved A flange is formed on each of the two ends, and the first compression spring and the second compression spring are respectively sleeved on the corresponding flanges; the abutting portion of the sliding rod is cylindrical and protrudes at two ends thereof respectively. a flange, and the first compression spring is sleeved on the corresponding flange, and the second compression spring is sleeved and fixed to the corresponding flange; the two ends of the sliding sleeve are respectively protruded to form a flange, and The first return spring and the second return spring are respectively sleeved and fixed to the corresponding flange; the lower end sleeve is open at one end of the sleeve and protrudes to form a flange, and the second return spring sleeve is fixed to the flange Flange.

Further, in the double-sleeve test rod, each of the perforation groups of each of the sliding sleeves comprises four perforations arranged at equal intervals.

Further, the double-sleeve test rod, wherein the outer wall surface of the lower end sleeve surrounds and protrudes to form an outer ring portion, the outer ring portion is located below the sleeve and upwardly abuts against the bottom end of the sleeve.

Further, the double-sleeve test rod, wherein the sleeve is a round tube and the outer wall surface of the sleeve is provided with a thread.

Further, the double sliding sleeve test rod, wherein the pressing head is made of a conductive material.

Further, the double-sleeve test rod, wherein the pressing head is a non-conductive material.

The technical means adopted by the present invention for achieving the intended purpose of creation are further explained below in conjunction with the drawings and the preferred embodiment of the present invention.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the double sliding test rod of the present invention comprises a sleeve 10 , two end sleeves 21 , 22 , a sliding rod 30 , two sliding sleeves 41 , 42 , and two compression springs 51 . 52, two return springs 61, 62, a pressing head 70, a load adjusting member 81 and a rubber ring 82.

Referring to FIG. 3 and FIG. 5, the two ends of the sleeve 10 are respectively an upper end opening 11 and a lower end opening 12, and in the embodiment, the sleeve 10 is a round tube and the outer wall surface of the sleeve 10 is provided. Threads are used to connect the machine, but not limited to this. The end sleeves 21 and 22 are tubular and are fixedly disposed in the sleeve 10, and the end sleeves 21 and 22 are respectively an upper end sleeve 21 and a lower end sleeve 22, and the upper end sleeve 21 is located at the upper end opening 11 of the sleeve 10, The lower end sleeve 22 is located at the lower end opening 12 of the sleeve 10; moreover, in the embodiment, the upper end sleeve 21 is open at one end of the sleeve 10 and protrudes to form a flange 211. The lower end sleeve 22 is open at one end of the sleeve 10 to form a protrusion. There is a flange 221, but not limited thereto, and the end sleeves 21, 22 may also have no flanges 211, 221. The sliding rod 30 is movably disposed in the sleeve 10, and the sliding rod 30 extends through the end sleeves 21, 22. The outer wall surface of the sliding rod 30 is spaced apart from the inner wall surface of the end sleeves 21, 22, and the outer wall surface of the sliding rod 30 An abutting portion 31 is formed, which is located in the sleeve 10, and the outer wall surface of the abutting portion 31 is spaced apart from the inner wall surface of the sleeve 10, in particular, the end sleeves 21, 22 are fixed to the sleeve 10, The sliding bar 30 is not in contact with the two, as shown in FIG. 4 and FIG. 5; in addition, in the embodiment, the abutting portion 31 of the sliding bar 30 is cylindrical and has a flange 311 protruding from both ends thereof. 312, but the shape is not limited to a cylindrical shape, and the flange 311 may not be provided. In addition, referring to FIG. 2 and FIG. 3 , the pressing head 70 is disposed at the bottom end of the sliding bar 30 and outside the sleeve 10 , and the pressing head 70 may be a conductive material or an elastic non-conductive material such as rubber. .

Referring to FIG. 3 , FIG. 5 , FIG. 7 and FIG. 8 , the two sliding sleeves 41 , 42 are movably disposed in the sleeve 10 , and are movably sleeved outside the sliding rod 30 , and the two sliding sleeves 41 , 42 is an upper sliding sleeve 41 and a sliding sleeve 42 respectively, the upper sliding sleeve 41 is located between the upper end opening 11 and the abutting portion 31, and the sliding sleeve 42 is located between the lower end opening 12 and the abutting portion 31; In the example, the flanges 411 and 412 are respectively protruded from the two ends of the upper sliding sleeve 41, and the flanges 421 and 422 are respectively protruded from the two ends of the sliding sleeve 42. However, the upper sliding sleeve 41 may not be convex. The rims 411, 412, and the sliding sleeve 42 may also have no flanges 421, 422. Further, the tube walls of the two sliding sleeves 41 and 42 are provided with a plurality of perforating groups 43 disposed therein, and the perforating groups 43 are arranged along the axial direction of the sliding sleeve 10, and each of the perforating groups 43 includes at least three perforations 431. The perforation group 43 of the two sliding sleeves 41 and 42 includes four perforations 431, which are arranged at equal intervals, but the number and arrangement are not limited thereto. Each of the perforations 431 is rollably provided with a steel ball 432. The steel balls 432 simultaneously abut against the sliding bar 30 and the sleeve 10, that is, the steel balls 432 can simultaneously protrude from the inner and outer wall surfaces of the sliding sleeve, and the outer wall surface of the sliding rod 30 abuts against the perforating group 43. The steel balls 432 are further abutted against the inner wall surface of the sleeve 10 by the steel balls 432, so that the slide bar 30 and the sleeve 10 can be kept coaxial and the relative rolling movement of the steel balls 432 is performed.

As shown in FIG. 5 and FIG. 6 , the two compression springs 51 and 52 are disposed in the sleeve 10 and sleeved on the outside of the sliding rod 30 . The two compression springs 51 and 52 are respectively a first compression spring 51 and a second. The compression spring 52, the two ends of the first compression spring 51 abut against the upper end sleeve 21 and the upper sliding sleeve 41 respectively; specifically, in the embodiment, the two ends of the first compression spring 51 are respectively sleeved on the upper end sleeve 21 The flange 211 and the flange 411 of the upper sliding sleeve 41 are not limited thereto. If the upper end sleeve 21 and the upper sliding sleeve 41 have no design of the flanges 211 and 411, the two ends of the first compression spring 51 can also be directly Abutting against the corresponding two; the two ends of the second compression spring 52 abut against the abutting portion 31 of the upper sliding sleeve 41 and the sliding rod 30 respectively; specifically, in the embodiment, the second compression spring 52 The two ends are respectively disposed on the flange 412 of the upper sliding sleeve 41 and the flange 311 of the abutting portion 31, but not limited thereto, if the upper sliding sleeve 41 and the abutting portion 31 have no flanges 411, 311 The two ends of the second compression spring 52 can also be directly abutted against the corresponding two.

Referring to FIG. 5 and FIG. 6 , the two return springs 61 and 62 are disposed in the sleeve 10 and sleeved on the outside of the sliding rod 30 . The two return springs 61 and 62 are respectively a first return spring 61 and a second. The return spring 62, the two ends of the first return spring 61 are respectively fixed to the abutting portion 31 of the sliding bar 30 and the sliding sleeve 42; specifically, in the embodiment, the two ends of the first return spring 61 are respectively fixed to the yoke The flange 312 of the portion 31 and the flange 421 of the sliding sleeve 42 are not limited thereto. If the abutting portion 31 and the sliding sleeve 42 have no design of the flanges 312, 421, the two ends of the first return spring 61 The two ends of the second return spring 62 are respectively fixed to the sliding sleeve 42 and the lower end sleeve 22; specifically, in the embodiment, the two ends of the second return spring 62 are respectively The flange 422 of the sliding sleeve 42 and the flange 221 of the lower end sleeve 22 are fixed, but not limited thereto. If the sliding sleeve 42 and the lower end sleeve 22 have no design of the flanges 421, 221, the second return spring 62 Both ends can also be directly fixed to the corresponding two.

In addition, referring to FIG. 2 and FIG. 3, the load adjusting member 81 connects the sleeve 10 and the slide bar 30, and can adjust the axial position of the slide bar 30 in the sleeve 10; specifically, in this embodiment The outer wall surface of the rod 30 is provided with an external thread adjacent to the upper end sleeve 21, the load adjusting member 81 is tubular and provided with internal threads, and the load adjusting member 81 is sleeved and screwed to the outside of the sliding rod 30, and the load adjusting member 81 is located at the sleeve 10. Above, and selectively abuts against the top end of the sleeve 10, but the structure of the load adjusting member 81 is not limited thereto. The rubber ring 82 is disposed outside the sliding rod 30 and between the load adjusting member 81 and the upper end sleeve 22 for buffering the impact of the load adjusting member 81 and the upper end sleeve 22 when the sliding rod 30 rebounds. The above load adjusting member 81 and the rubber ring 82 are designed to adjust the relative position of the slide bar 30 and the sleeve 10 and further adjust the preload of each spring, but the present invention may not include the load adjusting member 81 and the rubber ring 82. .

Referring to FIG. 10, the second embodiment of the present invention further includes an outer spring 50A that is sleeved outside the sliding bar 30A, and the two ends of the outer spring 50A abut against the lower end sleeve 22A and the pressing head 70A, respectively. Used to increase the overall resilience. In addition, the lower end sleeve 22A may be formed with a flange 222A outside the sleeve, and an outer end sleeve 20A is provided and formed with a flange 21A, and both ends of the outer spring 50A are sleeved and fixed. Each of the flanges 222A, 21A is used for more stability, but is not limited thereto.

Referring to FIG. 11 and FIG. 12, in the third embodiment of the present invention, the outer wall surface of the lower end sleeve 22B is circumferentially protruded to form an outer ring portion 221B, and the outer ring portion 221B is located below the sleeve 10B and abuts upward. The bottom end of the sleeve 10B is used to increase the upward supporting force, but the lower end sleeve 22B may also have no outer ring portion 221B as shown in the first two embodiments.

When the present invention is used, as shown in FIG. 9, the outer wall surface of the sleeve 10 is screwed to the fixing member A, and the fixing member A is coupled to the machine table B, whereby the creation can be moved up and down with the machine table B. When the present design is pressed against the button to be tested, due to the resilience of the tested button itself or the end of the stroke of the tested button itself, the pressing head 70 is driven by an upwardly abutting force to drive the slider 30 relative to each other. The sleeve 10 is moved upward, as shown in Figs. 5 and 6, at which time the two compression springs 51, 52 are squeezed by the upward movement of the abutting portion 31, and the two return springs 61, 62 are placed against each other for any reason. The portion 31 is pulled by the upward movement of the abutting portion 31. During the process, the steel balls 432 of the two sliding sleeves 41 and 42 of the sliding sleeves 41 and 42 simultaneously abut against the sliding rod 30 and the sleeve 10 and are moved by rolling; When the test button is moved upward, the slide bar 30 loses the downward abutting force, and the abutting portion 31 receives the force of the two compression springs 51, 52 pushing back downwards, and the force of the two return springs is pulled back. Restore the overall state to its original state. During the entire movement, the slide bar 30 is not in direct contact with the end sleeves 21, 22 and the sleeve 10, but is indirectly opposed to the inner wall surface of the sleeve 10 by the steel ball 432 and is moved by rolling, so that no friction occurs. Consumption and other problems, and because the two return springs 61, 62 do not yaw left and right during the movement, and the length of the two compression springs 51, 52 is moderate, the amplitude of the left and right yaw can be reduced, and the spring and the sleeve 10 can be avoided. The problem of friction on the inner wall surface.

The above description is only a preferred embodiment of the present invention, and does not impose any form limitation on the present invention. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to limit the present creation, and has any technical field. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The technical essence of the creation Any simple modification, equivalent change and modification of the above embodiments are still within the scope of the technical solution of the present invention.

10‧‧‧ casing
11‧‧‧Upper opening
12‧‧‧Bottom opening
21‧‧‧Upper sleeve
211‧‧‧Flange
22‧‧‧Bottom sleeve
221‧‧‧Flange
30‧‧‧Slider
31‧‧‧Affiliation
311‧‧‧Flange
312‧‧‧Flange
41‧‧‧Upper sleeve
411‧‧‧Flange
413‧‧‧Flange
42‧‧‧ slip sleeve
421‧‧‧Flange
422‧‧‧Flange
43‧‧‧Perforation group
431‧‧‧Perforation
432‧‧‧ steel balls
51‧‧‧First compression spring
52‧‧‧Second compression spring
61‧‧‧First return spring
62‧‧‧Second return spring
70‧‧‧ Pressing head
81‧‧‧Load adjustment parts
82‧‧‧ Rubber ring
20A‧‧‧outer sleeve
21A‧‧‧Flange
22A‧‧‧Bottom sleeve
222A‧‧‧Flange
30A‧‧‧Slider
50A‧‧‧Outer spring
70A‧‧‧ Pressing head
22B‧‧‧Bottom sleeve
221B‧‧‧Outer Rings
10B‧‧‧ casing
A‧‧‧Fixed parts
B‧‧‧ machine
90‧‧‧ casing
91‧‧‧ rod
92‧‧‧ bushings
93‧‧‧Spring
94‧‧‧ probe

Figure 1 is a three-dimensional appearance of the creation. Figure 2 is a perspective view of the internal structure of the present creation. Figure 3 is an exploded perspective view of the present creation. Figure 4 is a schematic diagram showing the relationship between the end sleeve and the slider of the present invention. Figure 5 is a cross-sectional view of the internal structure of the present creation. Figure 6 is a schematic diagram of the motion of the internal structure of the present creation. Figure 7 is a perspective view of the sliding sleeve of the present invention. Fig. 8 is a schematic cross-sectional view showing the relationship between the sliding sleeve and the sliding rod and the sleeve of the present invention. Figure 9 is a schematic view showing the use of the authoring device on the machine. Figure 10 is a perspective external view of a second embodiment of the present creation. Figure 11 is a perspective external view of a third embodiment of the present invention. Figure 12 is a schematic view showing the internal structure of the third embodiment of the present invention. Figure 13 is a schematic cross-sectional view of a prior art test rod.

Claims (11)

The utility model relates to a double sliding sleeve test rod, which comprises: a sleeve, the two ends of the sleeve are respectively an upper end opening and a lower end opening; the two end sleeves are all tubular and are inserted and fixed in the sleeve, The two end sleeves are respectively an upper end sleeve and a lower end sleeve, the upper end sleeve is located at the upper end opening of the sleeve, the lower end sleeve is located at the lower end opening of the sleeve; a sliding rod is movably disposed thereon In the sleeve, the sliding rod penetrates the end sleeve, and the outer wall surface of the sliding rod is spaced apart from the inner wall surface of the end sleeve, and the outer wall surface of the sliding rod is formed with an abutting portion, which is located in the sleeve, The outer wall surface of the abutting portion is spaced apart from the inner wall surface of the sleeve; the two sliding sleeves are movably disposed in the sleeve and are movably sleeved outside the sliding rod, and the two sliding sleeves are respectively An upper sliding sleeve and a sliding sleeve, the upper sliding sleeve is located between the upper end opening and the abutting portion, the sliding sleeve is located between the lower end opening and the abutting portion; the tube wall of each sliding sleeve is disposed through There is a plurality of perforated groups arranged along the axial direction of the sliding sleeve, and each of the perforating groups includes a plurality of perforations, wherein each of the perforations is rollably provided with a steel ball, each of the steel balls abutting against the sliding rod and the sleeve; and two compression springs are disposed in the sleeve and sleeved outside the sliding rod The two compression springs are respectively a first compression spring and a second compression spring. The two ends of the first compression spring respectively abut against the upper end sleeve and the upper sliding sleeve, and the two ends of the second compression spring respectively abut Relying on the upper sliding sleeve and the abutting portion of the sliding rod; two return springs are disposed in the sleeve and sleeved outside the sliding rod, and the two return springs are respectively a first return spring and a a second return spring, the two ends of the first return spring are respectively fixed to the abutting portion of the sliding rod and the sliding sleeve, and the two ends of the second return spring are respectively fixed to the sliding sleeve and the lower end sleeve; a pressing head is disposed at a bottom end of the sliding bar and outside the sleeve. The double-sleeve test rod of claim 1, further comprising a load adjusting member coupled to the sleeve and the slide rod and adjustable in axial position of the slide rod in the sleeve. The double-sleeve test rod of claim 2, wherein the outer wall surface of the sliding rod is externally threaded adjacent to the upper end sleeve, the load adjusting member is tubular and internally threaded, and the load adjusting member is sleeved In addition to the slide bar, the load adjustment member is positioned above the sleeve and selectively abuts against the top end of the sleeve. The double-sleeve test rod of claim 3, further comprising a rubber ring disposed outside the sliding bar and between the load adjusting member and the upper end sleeve. The double-sleeve test rod according to any one of claims 1 to 4, further comprising an outer spring sleeved outside the sliding rod, and the two ends of the outer spring respectively abut the lower end sleeve and the Press the head. The double-sleeve test rod according to any one of claims 1 to 4, wherein: the upper end sleeve is open at one end of the sleeve and protrudes to form a flange, and the first compression spring is sleeved on the flange a flange is formed on each of the two ends of the upper sliding sleeve, and the first compression spring and the second compression spring are respectively sleeved on the corresponding flange; the abutting portion of the sliding rod is cylindrical and A flange is formed on each of the two ends, and the first compression spring is sleeved on the corresponding flange, and the second compression spring is sleeved and fixed on the corresponding flange; the two ends of the sliding sleeve respectively protrude Forming a flange, and the first return spring and the second pressure return spring are respectively sleeved and fixed to the corresponding flange; the lower end sleeve is open at one end of the sleeve and protrudes to form a flange, and the second A return spring sleeve is secured to the flange. The double-sleeve test rod according to any one of claims 1 to 4, wherein each of the perforation groups of each of the sliding sleeves comprises four perforations arranged at equal intervals. The double-sleeve test rod according to any one of claims 1 to 4, wherein an outer wall surface of the lower end sleeve is circumferentially protruded to form an outer ring portion, the outer ring portion is located below the sleeve, and is upwardly abutted The bottom end of the casing. The double-sleeve test rod of any one of claims 1 to 4, wherein the sleeve is a round tube and the outer wall surface of the sleeve is threaded. The double-sleeve test rod of any one of claims 1 to 4, wherein the pressing head is of a conductive material. The double-sleeve test rod of any one of claims 1 to 4, wherein the pressing head is a non-conductive material.