A screw connection structure capable of realizing accurate front and back alignment and a flashlight

Abstract

The utility model discloses a can realize accurate alignment's screw joint structure and flashlight, and the screw joint structure includes the main body, the barrel and the connecting ring, is equipped with the threaded connecting section on the main body, and the barrel is equipped with the butt joint part, the connecting ring is equipped with the threaded connection part, and the connecting ring is fixed with the main body assembly through the threaded tightening, the inner surface of the butt joint part of the barrel is the smooth structure, and the inner diameter of butt joint part is slightly less than the outer diameter of connecting ring to make the connecting ring form a combination with the barrel after embedding butt joint part through pressing. So can be pressed into the butt joint part of the barrel through pressing after the tightening of connecting ring, realize the close combination with the barrel, only need to make the main body and the element on the barrel align each other and press again, can realize the positioning of the barrel and the main body through the connecting ring, can realize accurate alignment after the tightening of the barrel and the main body through the connecting ring every time.

Description

Technical Field

[0001] This utility model relates to the field of flashlight technology, and in particular to a screw connection structure and flashlight that can achieve precise front-to-back alignment. Background Technology

[0002] Screw connections are used in many products, such as flashlights, where the body is typically connected to the main body via threads. Sometimes, for identification or aesthetic purposes, markings, patterns, text, or stripes are added to the main body and the body. Ideally, the elements on both the body and the main body should align perfectly after the body is screwed onto the main body. For example, if the number "1" is marked on both the main body and the body, with part on the body and part on the body, the assembled body should form the complete number "1". However, because the main body, body, and other components are mass-produced, and the threads are machined according to standard specifications, the threads of each body are not precisely matched to those of the main body. This results in the starting positions of the threads (relative to the elements) of each body (or main body) potentially not being entirely consistent. Consequently, most bodies cannot achieve the aforementioned perfect alignment after tightening. Typically, the elements on both bodies become misaligned after tightening, and if forced to align, the body may not be fully tightened. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a screw connection structure and flashlight that is simple in structure, reasonable in design, easy to use, and capable of precise front-to-back alignment of the product.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a screw connection structure that can achieve precise front-to-back alignment, comprising a main body and a cylindrical body, wherein the main body is provided with a threaded connecting section and the cylindrical body is provided with a mating part; it also includes a connecting ring, wherein the connecting ring is provided with a threaded connecting part that matches the threaded connecting section of the main body, and the connecting ring is assembled and fixed with the main body by tightening the threads; the inner surface of the mating part of the cylindrical body is a smooth structure, and the inner diameter of the mating part is slightly smaller than the outer diameter of the connecting ring so that the connecting ring forms an assembly with the cylindrical body after being pressed into the mating part.

[0005] Furthermore, the docking part includes a first cylindrical wall and a second cylindrical wall, the second cylindrical wall being located at the front end of the cylindrical body and the first cylindrical wall being located at the front end of the second cylindrical wall; the inner diameter of the second cylindrical wall is slightly smaller than the inner diameter of the first cylindrical wall, and the first cylindrical wall and the second cylindrical wall are connected and transitioned by a gradually narrowing transition section; the outer diameter of the connecting ring is slightly larger than the inner diameter of the second cylindrical wall, and the connecting ring is clamped by the second cylindrical wall.

[0006] Furthermore, an inwardly protruding stop wall is provided inside the cylinder behind the second cylinder wall, which stops the connecting ring when it is pressed into the cylinder.

[0007] Preferably, both the cylinder body and the connecting ring are made of metal, and the inner diameter of the second cylinder wall is 0.03-0.07 mm smaller than the outer diameter of the connecting ring.

[0008] Furthermore, the edge of the connecting ring opposite to the cylinder body is set with a chamfered structure to form a bevel, so that the diameter of this end of the connecting ring is smaller than the inner diameter of the second cylinder wall.

[0009] Furthermore, the threaded connection section on the main body is an external thread section, and the threaded connection part of the connecting ring is an internal thread located on the inner surface of the connecting ring.

[0010] Furthermore, a stop ring is provided at the tail of the connecting ring. The stop ring protrudes into the connecting ring, and after the connecting ring is screwed and fixed to the main body, the stop ring holds the outer end face of the external thread section.

[0011] A flashlight includes a main body and a tube body, wherein the tube body is assembled and fixed to the main body by the aforementioned screw connection structure.

[0012] This invention adds a connecting ring, which is screwed to the threaded section of the main body. After tightening the connecting ring, it is pressed into the mating part of the cylinder body to achieve a tight fit and prevent it from falling off. Thus, by simply aligning the elements on the main body and the cylinder body before pressing, the connecting ring achieves precise positioning of the cylinder body and the main body. Subsequent tightening of the cylinder body with the connecting ring ensures precise front-to-back alignment. Its simple structure and practicality solve the common industry problem of inaccurate front-to-back alignment after thread tightening. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the planar structure of this utility model;

[0015] Figure 3 This is a schematic cross-sectional view of the present invention.

[0016] Figure 4 This is an exploded view of the main body, cylinder, and connecting ring of this utility model;

[0017] Figure 5 This is a schematic diagram showing the assembly state of the connecting ring and the main body of this utility model;

[0018] Figure 6 This is a diagram showing the assembly state of the connecting ring and the cylinder body of this utility model;

[0019] Figure 7 This is a cross-sectional schematic diagram of the cylinder body of this utility model;

[0020] Figure 8 This is a schematic diagram of the connecting ring of this utility model.

[0021] In the diagram, 1 is the main body, 11 is the external thread section, 2 is the cylinder body, 21 is the first cylinder wall, 22 is the second cylinder wall, 23 is the transition section, 24 is the stop wall, 25 is the smooth surface, 3 is the connecting ring, 31 is the internal thread, 32 is the stop ring, 33 is the inclined surface, and 4 is the switch. Detailed Implementation

[0022] This embodiment uses a flashlight as an example, but this screw connection structure can also be extended to other products that use threaded connections. (Refer to...) Figures 1-8 The screw-on structure enabling precise front-to-back alignment includes a main body 1 and a cylindrical body 2. The main body 1 has a threaded connecting section, and the cylindrical body 2 has a mating part. Most of the surface of the cylindrical body 2 is covered with vertical stripes, but one area is a smooth surface 25. The smooth surface 25 must align with the switch on the main body 1 after assembly. Traditional methods have a low probability of achieving this alignment; only a small number of products can be aligned, most will have some misalignment, and some may not align at all. The structure also includes a connecting ring 3, which has a threaded connecting part that matches the threaded connecting section of the main body 1. The connecting ring 3 is assembled and fixed to the main body 1 by tightening the threads. The inner surface of the mating part of the cylindrical body 2 is smooth, and the inner diameter of the mating part is slightly smaller than the outer diameter of the connecting ring 3 so that the connecting ring 3, after being pressed into the mating part, forms a combined unit with the cylindrical body 2.

[0023] The docking part includes a first cylindrical wall 21 and a second cylindrical wall 22. The second cylindrical wall 22 is located at the front end of the cylindrical body 2, and the first cylindrical wall 21 is located at the front end of the second cylindrical wall 22. The inner diameter of the second cylindrical wall 22 is slightly smaller than the inner diameter of the first cylindrical wall 21. The first cylindrical wall 21 and the second cylindrical wall 22 are connected and transitioned by a gradually narrowing transition section 23. That is, the diameter of the cylindrical body 2 decreases from the opening inward, which makes it easier for the connecting ring 3 to enter the cylindrical body 2 at the beginning. The outer diameter of the connecting ring 3 is slightly larger than the inner diameter of the second cylindrical wall 22. After the connecting ring 3 is pressed into the cylindrical body 2, it is clamped by the second cylindrical wall 22 to ensure that the connecting ring 3 will not rotate inside the cylindrical body 2.

[0024] Inside the cylinder body 2, behind the second cylinder wall 22, there is an inwardly protruding stop wall 24. When the connecting ring 3 is pressed into the cylinder body 2, it is stopped by the stop wall 24 to prevent it from being pressed too deeply.

[0025] Both the cylinder body 2 and the connecting ring 3 are made of metal materials, such as stainless steel or aluminum alloy, and the inner diameter of the second cylinder wall 22 is 0.03-0.07 mm smaller than the outer diameter of the connecting ring 3. For example, the outer diameter of the connecting ring 3 is 47.00 mm, and the inner diameter of the second cylinder wall 22 is 46.95 mm.

[0026] The edge of the connecting ring 3 opposite to the cylinder body 2 is set with a chamfered structure to form a bevel 33, so that the diameter of this end of the connecting ring 3 is smaller than the inner diameter of the second cylinder wall 22.

[0027] The threaded connection section on the main body 1 is an external thread section 11, and the threaded connection part of the connecting ring 3 is an internal thread 31 located on the inner surface of the connecting ring 3.

[0028] A stop ring 32 is provided at the tail of the connecting ring 3. The stop ring 33 protrudes into the connecting ring 3. After the connecting ring 3 is screwed and fixed to the main body 1, the stop ring 32 holds the outer end face of the external thread section 11.

[0029] During assembly, first screw the mass-produced connecting ring 3 into the external thread section 11 of the main body 1, and tighten it all the way to the bottom. Then, place the assembly of the main body 1 and the connecting ring 3 upright under the hand press, with the connecting ring 3 at the top. Place the cylinder 2 on the connecting ring 3, ensuring that the smooth surface 25 is aligned with the switch 4. Then, operate the hand press so that its pressure head presses down on the top of the cylinder 2, pressing the connecting ring 3 completely into the cylinder 2. At this point, the cylinder 2 can be rotated, and the connecting ring 3 will rotate out along with the cylinder 2, forming an assembly with the cylinder 2. When assembling the cylinder 2 and the main body 1 again, simply tighten it all the way to align the smooth surface 25 with the switch 4, and misalignment will not occur again.

[0030] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A threaded connection structure capable of achieving precise front-to-back alignment, comprising a main body and a cylindrical body, wherein the main body is provided with a threaded connecting section and the cylindrical body is provided with a mating portion, characterized in that: It also includes a connecting ring, which has a threaded connection part that matches the threaded connection section of the main body. The connecting ring is assembled and fixed with the main body by tightening the thread. The inner surface of the cylinder body mating part has a smooth structure, and the inner diameter of the mating part is slightly smaller than the outer diameter of the connecting ring so that the connecting ring can form a combination with the cylinder body after being pressed into the mating part.

2. The screw connection structure capable of achieving precise front-to-back alignment according to claim 1, characterized in that: The docking part includes a first cylindrical wall and a second cylindrical wall. The second cylindrical wall is located at the front end of the cylindrical body, and the first cylindrical wall is located at the front end of the second cylindrical wall. The inner diameter of the second cylindrical wall is slightly smaller than the inner diameter of the first cylindrical wall. The first cylindrical wall and the second cylindrical wall are connected and transitioned by a gradually narrowing transition section. The outer diameter of the connecting ring is slightly larger than the inner diameter of the second cylindrical wall, and the connecting ring is clamped by the second cylindrical wall.

3. The screw connection structure capable of achieving precise front-to-back alignment according to claim 2, characterized in that: An inwardly protruding stop wall is provided inside the cylinder, behind the second cylinder wall, which stops the connecting ring when it is pressed into the cylinder.

4. The screw connection structure capable of achieving precise front-to-back alignment according to claim 2, characterized in that: Both the cylinder body and the connecting ring are made of metal, and the inner diameter of the second cylinder wall is 0.03-0.07mm smaller than the outer diameter of the connecting ring.

5. The screw connection structure capable of achieving precise front-to-back alignment according to claim 2, characterized in that: The edge of the connecting ring opposite the cylinder body is chamfered to form a bevel, so that the diameter of that end of the connecting ring is smaller than the inner diameter of the second cylinder wall.

6. The screw connection structure capable of achieving precise front-to-back alignment according to claim 1, characterized in that: The threaded connection section on the main body is an external thread section, and the threaded connection part of the connecting ring is an internal thread located on the inner surface of the connecting ring.

7. The screw connection structure capable of achieving precise front-to-back alignment according to claim 6, characterized in that: A stop ring is provided at the tail of the connecting ring. The stop ring protrudes into the connecting ring. After the connecting ring is screwed and fixed to the main body, the stop ring holds the outer end face of the external thread section.

8. A flashlight, comprising a main body and a tube body, characterized in that: The cylinder body is assembled and fixed to the main body through the screw connection structure described in any one of claims 1-7.

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