Rotary test pen

Abstract

The utility model belongs to the technical field of test pens, and particularly relates to a rotary test pen which comprises a test pen shell and a test pen core, the test pen core is fixedly connected to the middle of the test pen shell, a telescopic protection piece is arranged in the test pen shell, the protection piece is rotatably connected to one end in the test pen shell, and the test pen core is fixedly connected to the test pen shell. The testing pen core penetrates through the protection piece, one end of the outer wall of the testing pen shell is rotationally connected with an adjusting part used for driving the protection piece to stretch out and draw back to rotate, and a rubber sleeve is arranged on the outer wall of the testing pen shell. According to the utility model, the extension amount of the adjusting part is adjusted by rotating the protection piece, so that the extension amount of the end part of the test refill is adjusted, not only can the length of the end part of the test refill be adjusted when different electric appliances are measured, but also the test refill can be protected through the protection cylinder when the test refill is not used, and the service life of the test refill is prolonged; and the protective cylinder cannot fall off to cause protection loss in the carrying process, so that the practicability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of testing pen technology, specifically relating to a rotary testing pen. Background Technology

[0002] Test pens are products used by people to test current and voltage in daily life. Common applications of test pens include testing electronic components on circuit boards, wires, batteries, and electrical switches. In order to meet the needs of users during testing, test pens are equipped with a metal probe and an insulating cap that is required by safety standards to cover the metal probe, thus meeting different safety standards.

[0003] Existing test pens use an insulating cap to protect the pen tip. The cap and the test pen are separate components, which are easy to lose after being removed. Moreover, the cap is prone to falling off during transport due to vibration or impact from gaseous objects, resulting in loss of protection for the pen tip and affecting the practicality of the test pen. Utility Model Content

[0004] The purpose of this invention is to provide a rotary test pen that can improve the service life of the test pen tip, prevent the protective sleeve from falling off during carrying and thus improve its practicality, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotary testing pen, comprising a testing pen shell and a testing pen core, wherein the testing pen core is fixedly connected to the middle of the testing pen shell, and a retractable protective component is provided inside the testing pen shell, wherein the protective component is rotatably connected to one end inside the testing pen shell, the testing pen core passes through the protective component, and an adjustment component for driving the retraction and extension of the protective component is rotatably connected to one end of the outer wall of the testing pen shell, wherein a rubber sleeve is provided on the outer wall of the testing pen shell.

[0006] Furthermore, the test pen shell includes a housing, a retaining ring is fixedly connected to the side wall of the housing, a rubber sleeve is fixedly fitted on the outer wall of the housing, and the outer wall of the housing is provided with an annular groove. There are two annular grooves, which are respectively close to the end of the housing and one side of the retaining ring.

[0007] Furthermore, the inner wall of the housing is provided with equally spaced strip-shaped protrusions, and there is a sliding groove between two adjacent strip-shaped protrusions. A central hole is provided in the middle of the housing, and a plug is fixedly connected to one end of the housing.

[0008] Furthermore, the test pen refill includes a core body that passes through a central hole, a connector fixedly connected to one end of the core body, the connector fixedly connected inside the insert, and an integrally connected end cap provided at one end of the core body.

[0009] Furthermore, the protective component includes an inner cylinder, which is rotatably connected to the inside of the housing. One end of the inner cylinder is fixedly connected to a protective cylinder, and the other end of the inner cylinder is fixedly connected to a locking cylinder. The side wall of the locking cylinder is fixedly connected to equally spaced sliding strips, and several sliding strips are slidably connected to the inside of several sliding grooves.

[0010] Furthermore, the adjusting component includes a rotating cylinder movably sleeved on the outer wall of the housing, and the inner wall of the rotating cylinder is provided with rotating rings. There are two rotating rings, and the two rotating rings are respectively rotatably connected inside the two annular grooves.

[0011] Furthermore, one end of the rotating cylinder is fixedly connected to a conical cylinder, the inner wall of the conical cylinder is symmetrically provided with hemispherical protrusions, and the side wall of the inner cylinder is provided with two corresponding spiral grooves, and the two hemispherical protrusions are slidably connected inside the two spiral grooves respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by rotating the protective component to adjust the extension and retraction of the adjusting component, the amount of the test pen tip protruding can be adjusted. This not only allows for adjustment of the length of the test pen tip when measuring different electrical appliances, but also protects the test pen tip with the protective sleeve when not in use, thus improving the service life of the test pen tip. The protective sleeve will not fall off during carrying, thus improving practicality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0015] Figure 3 This is an exploded view of the present invention;

[0016] Figure 4 This is a cross-sectional view of the housing of this utility model;

[0017] Figure 5 This is a cross-sectional view of the adjusting component of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Test pen casing; 11. Housing; 12. Retaining ring; 13. Annular groove; 14. Strip-shaped protrusion; 15. Sliding groove; 16. Center hole; 17. Insert tube; 2. Test pen refill; 21. Core; 22. End; 23. Connector; 3. Protective component; 31. Inner tube; 32. Spiral groove; 33. Protective tube; 34. Engaging tube; 35. Sliding strip; 4. Adjustment component; 41. Rotating cylinder; 42. Conical cylinder; 43. Hemispherical protrusion; 44. Rotating ring; 5. Rubber sleeve. Detailed Implementation

[0020] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0021] like Figure 1 and 2 As shown, a rotary test pen includes a test pen shell 1 and a test pen refill 2. The test pen refill 2 is fixedly connected to the middle of the test pen shell 1. A retractable protective member 3 is provided inside the test pen shell 1. The protective member 3 is rotatably connected to one end inside the test pen shell 1. The test pen refill 2 passes through the protective member 3. One end of the outer wall of the test pen shell 1 is rotatably connected to an adjustment component 4 for driving the retraction and extension of the protective member 3. A rubber sleeve 5 is provided on the outer wall of the test pen shell 1.

[0022] According to the above structure, the extension and retraction of the adjusting component 4 can be adjusted by rotating the protective component 3 during use, thereby adjusting the amount of the end of the test pen 2 extending out. This not only allows for adjusting the length of the end of the test pen 2 when measuring different electrical appliances, but also protects the test pen 2 by adjusting the component 4 when not in use, thus improving the service life of the test pen 2.

[0023] like Figure 3 and 4 As shown, the test pen casing 1 includes a housing 11, a retaining ring 12 is fixedly connected to the side wall of the housing 11, a rubber sleeve 5 is fixedly fitted on the outer wall of the housing 11, an annular groove 13 is provided on the outer wall of the housing 11, there are two annular grooves 13, the two annular grooves 13 are respectively close to the end of the housing 11 and one side of the retaining ring 12, the inner wall of the housing 11 is provided with equally spaced strip protrusions 14, there is a sliding groove 15 between two adjacent strip protrusions 14, a central hole 16 is provided in the middle of the housing 11, and an insert 17 is fixedly connected to one end inside the housing 11.

[0024] According to the above structure, when in use, the test pen refill 2 is fixed inside the housing 11, and the terminal of the wiring end is inserted into the inside of the plug tube 17, thereby realizing the connection between the wire and the test pen refill 2.

[0025] like Figure 3As shown, the test pen refill 2 includes a core 21, which passes through the central hole 16. One end of the core 21 is fixedly connected to a connector 23, which is fixedly connected inside the insert 17. One end of the core 21 is provided with an integrally connected end 22.

[0026] According to the above structure, during installation, the connector 23 is fixed inside the insert 17. When the terminal at the end of the wire is inserted into the insert 17, it can be connected to the connector 23, thereby realizing the connection between the test pen refill 2 and the wire. When in use, the end 22 is brought into contact with the electrode.

[0027] like Figure 3 and 4 As shown, the protective component 3 includes an inner cylinder 31, which is rotatably connected to the inside of the housing 11. One end of the inner cylinder 31 is fixedly connected to a protective cylinder 33, and the other end of the inner cylinder 31 is fixedly connected to a locking cylinder 34. The side wall of the locking cylinder 34 is fixedly connected to equally spaced sliding strips 35, and several sliding strips 35 are slidably connected to the inside of several sliding grooves 15. The adjusting component 4 includes a rotating cylinder 41 movably sleeved on the outer wall of the housing 11. The inner wall of the rotating cylinder 41 is provided with a rotating ring 44. There are two rotating rings 44, and the two rotating rings 44 are rotatably connected to the inside of two annular grooves 13. One end of the rotating cylinder 41 is fixedly connected to a conical cylinder 42. The inner wall of the conical cylinder 42 is symmetrically provided with hemispherical protrusions 43. The side wall of the inner cylinder 31 is provided with two corresponding spiral grooves 32, and the two hemispherical protrusions 43 are slidably connected to the inside of the two spiral grooves 32.

[0028] According to the above structure, in use, by rotating the rotating cylinder 41, the rotating ring 44 rotates inside the corresponding annular groove 13. The rotation of the rotating cylinder 41 drives the conical cylinder 42 and the hemispherical protrusion 43 to rotate. After the hemispherical protrusion 43 rotates, it is guided by the spiral groove 32 to drive the inner cylinder 31 to move up and down. The up and down movement of the inner cylinder 31 drives the protective cylinder 33 to move up and down, thereby adjusting the length of the end 22 extending relative to the protective cylinder 33. When not in use, the end 22 can be completely retracted into the protective cylinder 33 for protection. When the inner cylinder 31 moves up and down, the slide bar 35 slides along the slide groove 15 to prevent the inner cylinder 31 from rotating.

[0029] The working principle of this utility model is as follows: During use, the extension and retraction of the adjusting component 4 is adjusted by rotating the protective component 3, thereby adjusting the extension of the end of the test pen 2. This not only allows for adjustment of the length of the end of the test pen 2 when measuring different electrical appliances, but also protects the test pen 2 when not in use by adjusting the component 4, thus improving the service life of the test pen 2. During installation, the connector 23 is fixed inside the insert 17. After the terminal of the wire end is inserted into the insert 17, it can be connected to the connector 23, thereby realizing the connection between the test pen 2 and the wire. During use, the end 22 is connected to the electrode. Contact is all that is needed. By rotating the rotating cylinder 41, the rotating ring 44 rotates inside the corresponding annular groove 13. The rotation of the rotating cylinder 41 drives the conical cylinder 42 and the hemispherical protrusion 43 to rotate. After the hemispherical protrusion 43 rotates, it is guided by the spiral groove 32 to drive the inner cylinder 31 to move up and down. The up and down movement of the inner cylinder 31 drives the protective cylinder 33 to move up and down, thereby adjusting the length of the end 22 extending relative to the protective cylinder 33. When not in use, the end 22 can be completely retracted into the protective cylinder 33 for protection. When the inner cylinder 31 moves up and down, the slide bar 35 slides along the slide groove 15 to prevent the inner cylinder 31 from rotating.

[0030] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A rotary test pen comprising a test pen housing (1) and a test pen cartridge (2), characterized in that: The test pen core (2) is fixedly connected in the middle of the test pen shell (1), the inside of the test pen shell (1) is provided with a telescopic protection piece (3), the protection piece (3) is rotatably connected to one end inside the test pen shell (1), the test pen core (2) penetrates the protection piece (3), one end of the outer wall of the test pen shell (1) is rotatably connected with an adjusting component (4) for driving the protection piece (3) to extend and retract, and the outer wall of the test pen shell (1) is provided with a rubber sleeve (5).

2. A rotary test pen according to claim 1, wherein: The test pen shell (1) comprises a shell (11), the side wall of the shell (11) is fixedly connected with a blocking ring (12), the rubber sleeve (5) is fixedly sleeved on the outer wall of the shell (11), the outer wall of the shell (11) is provided with an annular groove (13), the annular groove (13) has two, and the two annular grooves (13) are respectively close to one end of the shell (11) and one side of the blocking ring (12).

3. A rotating test pen according to claim 2, wherein: The inner wall of the shell (11) is provided with equidistantly distributed strip-shaped protrusions (14), and a sliding groove (15) is formed between adjacent two strip-shaped protrusions (14). The middle of the shell (11) is provided with a center hole (16), and one end inside the shell (11) is fixedly connected with a plug (17).

4. A rotating test pen according to claim 3, wherein: The test pen core (2) comprises a core body (21), the core body (21) penetrates the center hole (16), one end of the core body (21) is fixedly connected with a connecting head (23), the connecting head (23) is fixedly connected inside the plug (17), and one end of the core body (21) is provided with an integral end head (22).

5. A rotating test pen according to claim 4, wherein: The protection piece (3) comprises an inner cylinder (31), the inner cylinder (31) is rotatably connected inside the shell (11), one end of the inner cylinder (31) is fixedly connected with a protection cylinder (33), the other end of the inner cylinder (31) is fixedly connected with a clamping cylinder (34), the side wall of the clamping cylinder (34) is fixedly connected with equidistantly distributed sliding strips (35), and a plurality of sliding strips (35) are respectively and slidably connected inside a plurality of sliding grooves (15).

6. A rotating test pen according to claim 5, wherein: The adjusting component (4) comprises a rotating cylinder (41) movably sleeved on the outer wall of the shell (11), the inner wall of the rotating cylinder (41) is provided with a rotating ring (44), the rotating ring (44) has two, and the two rotating rings (44) are rotatably connected inside the two annular grooves (13).

7. A rotating test pen according to claim 6, wherein: One end of the rotating cylinder (41) is fixedly connected with a conical cylinder (42), the inner wall of the conical cylinder (42) is symmetrically provided with a hemispherical protrusion (43), the side wall of the inner cylinder (31) is provided with two correspondingly arranged spiral grooves (32), and two hemispherical protrusions (43) are respectively and slidably connected inside the two spiral grooves (32).

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