A tail cap retractable flashlight

Abstract

This invention discloses a retractable tailcap flashlight, comprising a body with a lamp head at one end and a connecting part at the other end; a charging base fixedly connected to the connecting part, the charging base having a charging interface; and a retractable tailcap fitted over the charging base and slidable relative to the charging base along its axial direction. A limiting mechanism is provided between the charging base and the retractable tailcap to restrict the retractable tailcap from sliding outwards from the connecting part. When the retractable tailcap is at its extreme sliding position, the charging interface is exposed; when the retractable tailcap slides towards the connecting part, it covers the charging interface. This invention uses a mechanical seal between the retractable tailcap and the charging base to replace the traditional dust plug, and, in conjunction with multi-level inclined steps, achieves reliable positioning and smooth sliding of the tailcap, effectively improving the product's protective reliability, service life, and appearance consistency.

Description

Technical Field

[0001] This invention relates to the field of lighting equipment technology, and more particularly to a flashlight with a retractable tail cap. Background Technology

[0002] A flashlight is a portable handheld lighting tool. Its core principle is to convert the electrical energy stored in the battery into light energy through a light-emitting element, and to focus the light into a beam using a reflector or lens to provide directional lighting in dark or low-light environments.

[0003] Currently, rechargeable flashlights dominate the market. These flashlights typically have a charging port, which is generally sealed with silicone or rubber dust plugs. However, in harsh environments such as mines and industrial settings, where flammable and explosive gases, dust, and moisture are present, ordinary silicone or rubber dust plugs, while offering some protection, can be worn away and embedded by high-hardness dust particles, reducing their sealing effectiveness. Furthermore, acidic or alkaline moisture and ozone can accelerate rubber aging and cracking, leading to protective failure. This can result in conductive dust or moisture intrusion, causing a short circuit at the charging port. Additionally, acidic or alkaline moisture can slowly corrode internal precision components and motherboard solder joints, causing progressive damage and significantly shortening the flashlight's lifespan.

[0004] Secondly, most existing flashlights are installed in three sections, namely the lamp head, the body, and the tail cap, which are connected by screwing them together in sequence. This makes the production and installation process complicated and inefficient. At the same time, when installing flashlights with non-cylindrical shells, the accumulated assembly errors of the three-section screwing installation will cause misalignment between the edges of the lamp head and the body, affecting the consistency of the product's appearance. Summary of the Invention

[0005] The purpose of this invention is to provide a retractable tail cap flashlight. Through the cooperative structure of the retractable tail cap and charging base, a mechanical seal replaces the traditional silicone or rubber dust plug sealing solution, fundamentally avoiding the protective failure caused by dust wear and chemical corrosion of the dust plug. This effectively improves the flashlight's protective reliability and service life in harsh environments such as industrial and mining areas. Simultaneously, the modular pre-assembly structure of the integrated body and battery bracket simplifies the assembly process, improves assembly efficiency, and fundamentally eliminates the step difference problem after assembly in non-cylindrical shell flashlights, ensuring product appearance consistency and solving the aforementioned problems in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a retractable tail cap flashlight, comprising: The tube body has a lamp head at one end and a connecting part at the other end; A charging dock is fixedly connected to the connecting part, and the charging dock is provided with a charging interface; A telescopic tail cap is fitted onto the outside of the charging base and can slide relative to it along the axial direction of the charging base; A limiting mechanism is provided between the charging base and the telescopic tail cover to restrict the telescopic tail cover from sliding out in a direction away from the connecting part; When the telescopic tail cover is in its extended position, the charging interface is exposed; when the telescopic tail cover slides towards the connecting part, it covers the charging interface.

[0007] Furthermore, the limiting mechanism includes a first limiting protrusion disposed on the charging base and a second limiting protrusion disposed on the inner wall of the telescopic tail cover; When the telescopic tail cover slides away from the connecting part to the sliding limit position, the first limiting protrusion abuts against the second limiting protrusion to prevent the telescopic tail cover from detaching from the charging base.

[0008] Furthermore, the charging base is provided with a plurality of spring contacts at the end away from the connecting part, and the first limiting protrusion is connected to the end of the spring contacts; The telescopic tail cover includes a tail cover body and a base, and the second limiting protrusion is disposed on the inner wall of the end of the tail cover body away from the charging base.

[0009] Furthermore, the inner and outer sides of the first limiting protrusion are respectively provided with a first inclined step and a second inclined step; The second limiting protrusion is provided with a fourth inclined step on each side; The outer fourth inclined step corresponds to and engages with the second inclined step, and the inner fourth inclined step corresponds to and engages with the first inclined step.

[0010] Furthermore, a pressing end is provided at one end of the tail cover body near the charging base; A third inclined step is provided on the outer side of the extrusion end, and a second right-angle step is provided at the connection between the extrusion end and the tail cap body; A first right-angle step is provided at the connection between the first limiting protrusion and the spring piece; The third inclined step corresponds to and engages with the second inclined step, and the second right-angle step corresponds to and engages with the first right-angle step.

[0011] Furthermore, the outer wall of the charging base is provided with a tail gasket, which is elastically pressed into the inner wall of the telescopic tail cover.

[0012] Furthermore, it also includes a battery bracket, which is disposed inside the cylinder body. The battery bracket contains a lamp head assembly and a battery assembly, and the charging base is electrically connected to the battery assembly.

[0013] Furthermore, the inner wall of the connecting part is provided with a threaded boss, and the outer wall of the connecting part is provided with a second threaded hole, which penetrates the outer wall of the connecting part and extends into the threaded boss; The end of the charging base is provided with a mating hole, and a second bolt is installed in the mating hole. The second bolt passes through the mating hole and the second threaded hole and is threadedly connected to the threaded boss.

[0014] Furthermore, the number of the spring pieces is two or more, and they are distributed at intervals along the circumference of the charging base.

[0015] Furthermore, the cylinder body is a non-cylindrical outer shell.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention relates to a retractable tail cap flashlight. Through the cooperative structure of the retractable tail cap and charging base, the mechanical seal of the retractable tail cap replaces the single-material sealing solution of traditional silicone or rubber dust plugs. This fundamentally avoids the problems of dust plugs aging and cracking caused by wear and embedding of high-hardness dust particles, as well as corrosion from acids, alkalis, water vapor, and ozone. This significantly improves the reliability of the charging interface protection in harsh environments such as industrial and mining areas. The retractable tail cap, fitted onto the outer surface of the charging base, completely covers the charging interface when not charging, effectively isolating it from external dust, water vapor, and corrosive gases. This prevents short circuits in the charging interface caused by conductive dust or water vapor intrusion, as well as progressive corrosion damage to internal precision components and motherboard solder joints, significantly extending the flashlight's service life in harsh environments. The telescopic tail cover achieves reliable positioning through a multi-stage inclined step structure between the first limiting protrusion on the spring and the pressing end and second limiting protrusion of the telescopic tail cover. The cooperation between the outer fourth inclined step and the second inclined step allows the telescopic tail cover to elastically deform by pressing the spring during sliding, ensuring smooth sliding with moderate resistance. The cooperation between the inner fourth inclined step and the first inclined step limits the telescopic tail cover after installation, preventing unexpected loosening. The rigid contact between the second right-angle step and the first right-angle step forms a limiting stop when the telescopic tail cover slides to its maximum stroke, preventing excessive pulling and detachment. This multi-stage limiting structure ensures that the telescopic tail cover provides clear tactile feedback and convenient operation during pulling, while maintaining reliable fixation when stationary. In addition, the tail cover body and base are integrally molded using a rubber coating process, eliminating assembly seams in split structures and further improving overall sealing and structural strength.

[0017] This invention employs a two-section installation structure with a modular pre-assembled integrated body and battery bracket. The lamp head assembly and battery assembly are pre-integrated onto the battery bracket, which is then inserted into the body and secured with bolts. Finally, the charging base is fitted onto the outside of the connecting part of the body and fixed in place. This simplifies the assembly process from multiple steps in the traditional three-section installation to two, significantly improving production efficiency. Furthermore, the two-section installation structure fundamentally eliminates the misalignment problem between the lamp head and the body surface caused by the three-section threaded assembly in non-cylindrical flashlights, ensuring consistent product appearance. The charging base and battery assembly are electrically connected via an FPC connector, further simplifying the electrical connection process during assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the retractable tail cap flashlight of the present invention; Figure 2 This is an exploded structural diagram of the retractable tail cap flashlight of the present invention; Figure 3 This is a cross-sectional structural diagram of the retractable tail cap flashlight of the present invention; Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A; Figure 5 for Figure 3 A magnified view of the structure at point B in the middle; Figure 6 This is a schematic diagram of the structure of the inner body of the telescopic flashlight with a tail cap according to the present invention; Figure 7 This is a schematic diagram of the connection between the body and the charging base of the telescopic flashlight with a tail cap according to the present invention. Figure 8 This is a schematic diagram of the charging base in the retractable tail cap flashlight of the present invention. Figure 9 This is a schematic diagram of the retractable tail cap structure in the retractable tail cap flashlight of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Body; 11. Lamp head; 12. Connecting part; 121. First threaded hole; 122. Second threaded hole; 123. Threaded boss; 2. Battery bracket; 21. Lamp head assembly; 22. Lamp head washer; 3. Charging base; 31. Charging interface; 32. Tail seat washer; 321. Washer groove; 33. Spring piece; 34. First limiting protrusion; 35. First right-angle step; 36. First inclined step; 37. Second inclined step; 4. Telescopic tail cap; 41. Tail cap body; 411. Pressing end; 412. Second limiting protrusion; 413. Third inclined step; 414. Second right-angle step; 415. Fourth inclined step; 42. Base. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "length," "width," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Example 1 like Figures 1 to 9As shown, the telescopic tail cap flashlight of this embodiment 1 includes a body 1, a battery bracket 2, a charging base 3, and a telescopic tail cap 4. The body 1 is a one-piece shell with a lamp head 11 at one end and a connecting part 12 at the other. The one-piece design of the body 1 eliminates the need for separate processing of the lamp head and body as in traditional flashlights, which requires threaded assembly. This fundamentally avoids the segmentation problem caused by the three-section assembly of non-cylindrical shell flashlights, while also reducing the number of parts and simplifying the assembly process. Preferably, the body 1 is a non-cylindrical shell, such as a hexagonal shell. For non-cylindrical shell flashlights, the traditional three-section installation method makes it difficult to ensure the alignment of the lamp head and the body's edges. The one-piece body structure of this embodiment fundamentally eliminates this problem, ensuring product appearance consistency.

[0026] Specifically, the battery bracket 2 is located inside the body 1. The battery bracket 2 houses the lamp head assembly 21 and the battery assembly. Serving as the mounting carrier for both the lamp head assembly 21 and the battery assembly, the battery bracket 2 can be pre-assembled into a single module. It is then inserted into the body 1 from one end of the connecting part 12, and bolts are used to secure the battery bracket 2 to the connecting part 12. This allows for rapid installation and positioning of the lamp head assembly 21 and the battery assembly inside the body 1. The lamp head assembly 21 can adopt a conventional flashlight lamp head structure, including a light-emitting element (such as an LED), a reflector, or a lens. The lamp head assembly 21 is fixedly connected to the battery bracket 2 using bolts.

[0027] like Figure 2 As shown, the charging base 3 is sleeved on the outside of the connecting part 12 and fixedly connected to the connecting part 12. The charging base 3 is electrically connected to the battery assembly. Figure 7 As shown, the charging base 3 is provided with a charging interface 31, which is used to connect to an external power source to charge the battery assembly; a plurality of spring contacts 33 are provided at the end of the charging base 3 away from the connecting part 12. The spring contacts 33 are distributed at intervals along the circumference of the charging base 3 and have a certain elastic deformation capability. The ends of the spring contacts 33 are connected to a first limiting protrusion 34, such as... Figure 5 As shown, the inner and outer sides of the first limiting protrusion 34 are respectively provided with a first inclined step 36 and a second inclined step 37, and a first right-angle step 35 is provided at the connection between the first limiting protrusion 34 and the spring piece 33.

[0028] A retractable tail cap 4 is fitted onto the outer surface of the charging base 3 to shield and protect the charging interface 31 when not charging, preventing external dust, moisture, and corrosive gases from directly contacting the charging interface 31. Specifically, for example... Figure 9As shown, the telescopic tail cover 4 includes a tail cover body 41 and a base 42. The tail cover body 41 and the base 42 are integrally formed by a rubber coating process. Compared with a split structure, the integral molding process eliminates the assembly seam between the tail cover body 41 and the base 42, preventing dust and moisture from entering from the seam, significantly improving the overall sealing performance and structural strength of the telescopic tail cover 4, while simplifying the number of parts and production processes. Furthermore, the tail cover body 41 has a pressing end 411 at the end near the charging base 3, and a second limiting protrusion 412 on the inner wall of the end of the tail cover body 41 away from the charging base 3, as shown... Figure 5 As shown, the second limiting protrusion 412 is provided with a fourth inclined step 415 on both sides, as... Figure 4 As shown, a third inclined step 413 is provided on the outer side of the extrusion end 411, and a second right-angle step 414 is provided at the connection between the extrusion end 411 and the tail cap body 41.

[0029] The outer fourth inclined step 415 corresponds to the second inclined step 37, which is used to cause the spring piece 33 to elastically deform through inclined pressure when the telescopic tail cover 4 slides, so that the telescopic tail cover 4 can slide smoothly. The inner fourth inclined step 415 corresponds to the first inclined step 36, which is used to limit the telescopic tail cover 4 after installation, preventing the telescopic tail cover 4 from becoming loose or falling off unexpectedly due to gravity or vibration when not in use. The third inclined step 413 corresponds to the second inclined step 37, which is used to cause the spring piece 33 to elastically deform through inclined pressure when the telescopic tail cover 4 is pushed into the assembly, so as to facilitate the push-in installation of the telescopic tail cover 4. The second right-angle step 414 corresponds to the first right-angle step 35, which is used to form a limit stop when the telescopic tail cover 4 slides to the maximum stroke, preventing the telescopic tail cover 4 from falling off the charging base 3 due to excessive sliding.

[0030] like Figure 6 As shown, a first threaded hole 121 is provided on the outer wall of the connecting part 12, and a first bolt is installed in the first threaded hole 121. The battery bracket 2 and the connecting part 12 are fixedly connected by the first bolt. That is, after the battery bracket 2 is inserted into the cylinder 1 from one end of the connecting part 12, the first bolt passes through the first threaded hole 121 on the outer wall of the connecting part 12 to lock and fix the battery bracket 2 inside the cylinder 1, thereby achieving reliable fixation between the battery bracket 2 and the cylinder 1.

[0031] Furthermore, the inner wall of the connecting part 12 is provided with a threaded boss 123, and the outer wall of the connecting part 12 is provided with a second threaded hole 122. The second threaded hole 122 penetrates the outer wall of the connecting part 12 and extends into the threaded boss 123. The end of the charging base 3 is provided with a mating hole, and a second bolt is installed in the mating hole. The second bolt passes through the mating hole and the second threaded hole 122 and is threadedly connected to the threaded boss 123. The setting of the threaded boss 123 ensures that the second threaded hole 122 has sufficient thread engagement length, which ensures the connection strength and reliability between the charging base 3 and the cylinder 1 and avoids loosening of the connection due to insufficient thread engagement length.

[0032] Among them, such as Figure 2 , Figure 3 As shown, a lamp head gasket 22 is provided on the outer side of the lamp head assembly 21. The lamp head gasket 22 cooperates with the inner wall of the body 1 to achieve waterproofing and dustproofing at the lamp head assembly 21. The lamp head gasket 22 is sandwiched between the lamp head assembly 21 and the inner wall of the body 1, and forms a seal through elastic compression to prevent external dust and moisture from entering the flashlight from the lamp head.

[0033] In this embodiment, the charging base 3 and the battery assembly are electrically connected via an FPC connector, enabling the charging circuit between the charging base 3 and the battery assembly to be connected. The FPC connector has good flexibility and bendability, which can adapt to the assembly requirements of the narrow space inside the flashlight, and at the same time, it can realize a plug-in quick connection, further simplifying the electrical connection operation during the assembly process. Figure 7 As shown, the outer wall of the charging base 3 is provided with a tail gasket 32. The tail gasket 32 ​​is elastically squeezed and cooperates with the inner wall of the telescopic tail cover 4, which not only plays the role of sealing and dust prevention, but also provides a certain holding force when the telescopic tail cover 4 is in a non-sliding state, preventing the telescopic tail cover 4 from sliding off by gravity.

[0034] Furthermore, such as Figure 8 As shown, the outer wall of the charging base 3 has a washer groove 321, and the tail seat washer 32 is embedded in the washer groove 321, thereby reliably positioning the tail seat washer 32 and preventing the tail seat washer 32 from shifting, twisting or falling off during the reciprocating sliding of the telescopic tail cover 4. Preferably, the outer wall of the charging base 3 is provided with two tail seat washers 32, and correspondingly, the outer wall of the charging base 3 has two washer grooves 321.

[0035] In this embodiment, the number of spring pieces 33 is two or more, and they are distributed at intervals along the circumference of the charging base 3 to ensure that the telescopic tail cover 4 is subjected to uniform force during sliding, slides smoothly and with moderate resistance, and avoids jamming or tilting caused by uneven force on one side. Preferably, as Figure 8 As shown, there are three shrapnel pieces 33.

[0036] In this embodiment 1, the retractable tail cap flashlight is assembled by first inserting the lamp head assembly 21 and the battery assembly into the battery bracket 2. Then, the battery bracket 2 is inserted into the body 1 from one end of the connecting part 12, and a first bolt is inserted into the first threaded hole 121 to fix the battery bracket 2 to the body 1. The lamp head assembly 21 consists of a conventional flashlight lamp head, a plane mirror, a reflector, etc., and the connection between the lamp head assembly 21 and the battery bracket 2 is also fixed by bolts.

[0037] Then, the charging base 3 is fitted onto the outside of the connecting part 12 of the cylinder body 1. After the second bolt passes through the mating hole at the end of the charging base 3 and the second threaded hole 122 on the outer wall of the connecting part 12, it is threadedly connected to the threaded boss 123 on the inner wall of the connecting part 12, thus fixing the charging base 3 to the cylinder body 1 and making the charging base 3 electrically connected to the battery assembly through the FPC connector.

[0038] Finally, push the telescopic tail cover 4 along one end of the charging base 3 and fit it on the outer surface of the charging base 3. Through the limiting of the first limiting protrusion 34 on the spring piece 33 and the squeezing of the tail seat washer 32, the telescopic tail cover 4 is installed on the outer surface of the charging base 3, so that the telescopic tail cover 4 can slide up and down within the preset stroke.

[0039] Specifically, during the assembly of the telescopic tail cover 4 and the charging base 3, the telescopic tail cover 4 is slowly pushed in and fitted onto the surface of the charging base 3. During the pushing process, the telescopic tail cover 4 will be blocked by the first limiting protrusion 34 on the spring piece 33. If the telescopic tail cover 4 is pushed in with force, firstly, the third inclined step 413 of the pressing end 411 of the telescopic tail cover 4 contacts the second inclined step 37 of the spring piece 33. Under the cooperation and pressing of the inclined steps of both parties, the first limiting protrusion 34 causes the spring piece 33 to be compressed and generate elastic deformation, thereby causing the spring piece 33 to shrink and deform inward, so that the telescopic tail cover 4 can be pushed in smoothly. After the telescopic tail cover 4 is pushed in, the pressing end 411 passes the first limiting protrusion 34, and the spring piece 33 loses the external force and elastically returns to its original position. Then the second limiting protrusion 412 also presses the first limiting protrusion 34 in the same way and passes through, and the spring piece 33 returns to its original position again. At this time, the telescopic tail cover 4 is installed.

[0040] After installation, the second limiting protrusion 412 of the telescopic tail cover 4 contacts the first limiting protrusion 34 of the spring piece 33. The first limiting protrusion 34 limits the second limiting protrusion 412. At the same time, combined with the elastic squeezing action of the tail seat gasket 32 ​​on the inner wall of the telescopic tail cover 4, the telescopic tail cover 4 is fitted on the outer surface of the charging base 3 and will not move up and down under the action of no external force.

[0041] When the telescopic tail cap 4 needs to be slid, the user holds the telescopic tail cap 4 and applies a downward pulling force. At this time, under the action of external force, the fourth inclined step 415 on the outer side of the second limiting protrusion 412 cooperates with the first inclined step 36 of the first limiting protrusion 34. Under the guidance of the inclined surface, the first limiting protrusion 34 is squeezed, causing the spring piece 33 to elastically deform inward again. At this time, the telescopic tail cap 4 can slide down until the charging interface 31 is fully exposed, and the flashlight can be charged. When pulled out to the point where the squeezing end 411 contacts the first limiting protrusion 34, the second right-angle step 414 of the squeezing end 411 contacts the first right-angle step 35 of the first limiting protrusion 34. The two form a right-angle rigid abutment, and relative sliding cannot be generated by squeezing. At this time, the telescopic tail cap 4 can no longer slide down. This position is the maximum sliding stroke of the telescopic tail cap 4, which effectively prevents the telescopic tail cap 4 from detaching from the charging base 3 due to excessive pulling.

[0042] Example 2 The assembly method of the retractable tail cap flashlight in this embodiment 2 includes the following steps: Install the lamp holder assembly 21 and the battery assembly into the battery bracket 2; Insert the battery bracket 2 into the inside of the cylinder 1 from one end of the connecting part 12 of the cylinder 1, and fix the battery bracket 2 to the connecting part 12 by passing the first bolt through the first threaded hole 121 on the outer wall of the connecting part 12. The charging base 3 is sleeved on the outside of the connecting part 12. After the second bolt passes through the mating hole at the end of the charging base 3 and the second threaded hole 122 on the outer wall of the connecting part 12, it is threadedly connected to the threaded boss 123 on the inner wall of the connecting part 12, so that the charging base 3 is fixedly connected to the cylinder body 1 and electrically connected to the battery assembly. The telescopic tail cap 4 is pushed in along one end of the charging base 3 and fitted onto the outer surface of the charging base 3. During the pushing process, the third inclined step 413 of the pressing end 411 engages with the inclined surface of the second inclined step 37 of the spring piece 33, pressing the first limiting protrusion 34 to cause the spring piece 33 to undergo elastic deformation. After being pushed in, the spring piece 33 returns to its original position, and the second limiting protrusion 412 engages with the first limiting protrusion 34 to complete the installation.

[0043] This invention utilizes an integrated body and a modular pre-assembled battery bracket. The lamp head assembly and battery assembly are pre-integrated onto the battery bracket, which is then inserted into the body and secured with bolts. Finally, the charging socket is fitted onto the outside of the body's connecting section and fixed in place. The entire assembly process requires only two steps, eliminating the need for multiple screw-tightening operations on the lamp head, body, and tail cap as required by traditional three-section flashlights. This significantly simplifies the assembly process and improves production efficiency. Furthermore, this assembly method simplifies electrical connection operations by using an FPC connector for plug-in electrical connection between the charging socket and battery assembly, enabling rapid connection and conduction. In addition, this two-section modular assembly method fundamentally eliminates the misalignment problem between the lamp head and body surface caused by the three-section screw-tightening assembly in non-cylindrical flashlights, ensuring product appearance consistency.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A retractable tail cap flashlight, characterized in that, include: The tube body (1) has a lamp head (11) at one end and a connecting part (12) at the other end. The charging base (3) is fixedly connected to the connecting part (12), and the charging base (3) is provided with a charging interface (31). The telescopic tail cap (4) is sleeved on the outside of the charging base (3) and can slide relative to the charging base (3) along its axial direction; A limiting mechanism is provided between the charging base (3) and the telescopic tail cover (4) to restrict the telescopic tail cover (4) from sliding out in a direction away from the connecting part (12); When the telescopic tail cover (4) is in the extreme sliding position, the charging interface (31) is exposed; when the telescopic tail cover (4) slides towards the connecting part (12), it covers the charging interface (31).

2. The retractable tail cap flashlight according to claim 1, characterized in that, The limiting mechanism includes a first limiting protrusion (34) disposed on the charging base (3) and a second limiting protrusion (412) disposed on the inner wall of the telescopic tail cover (4). When the telescopic tail cap (4) slides away from the connecting part (12) to the sliding limit position, the first limiting protrusion (34) abuts against the second limiting protrusion (412) to prevent the telescopic tail cap (4) from coming off the charging base (3).

3. The retractable tail cap flashlight according to claim 2, characterized in that, The charging base (3) has a plurality of spring pieces (33) at one end away from the connecting part (12), and the first limiting protrusion (34) is connected to the end of the spring piece (33); The telescopic tail cap (4) includes a tail cap body (41) and a base (42), and the second limiting protrusion (412) is disposed on the inner wall of the end of the tail cap body (41) away from the charging base (3).

4. The retractable tail cap flashlight according to claim 3, characterized in that, The first limiting protrusion (34) has a first inclined step (36) and a second inclined step (37) on its inner and outer sides, respectively. The second limiting protrusion (412) is provided with a fourth inclined step (415) on both sides. The fourth inclined step (415) on the outer side corresponds to and engages with the second inclined step (37), and the fourth inclined step (415) on the inner side corresponds to and engages with the first inclined step (36).

5. The retractable tail cap flashlight according to claim 4, characterized in that, The tail cap body (41) has a pressing end (411) at one end near the charging base (3). A third inclined step (413) is provided on the outer side of the extrusion end (411), and a second right-angle step (414) is provided at the connection between the extrusion end (411) and the tail cap body (41). A first right-angle step (35) is provided at the connection between the first limiting protrusion (34) and the spring piece (33). The third inclined step (413) corresponds to and engages with the second inclined step (37), and the second right-angle step (414) corresponds to and engages with the first right-angle step (35).

6. The retractable tail cap flashlight according to claim 1, characterized in that, The outer wall of the charging base (3) is provided with a tail gasket (32), and the tail gasket (32) is elastically squeezed into the inner wall of the telescopic tail cover (4).

7. The retractable tail cap flashlight according to claim 1, characterized in that, It also includes a battery bracket (2), which is disposed inside the cylinder body (1). The battery bracket (2) is provided with a lamp head assembly (21) and a battery assembly, and the charging base (3) is electrically connected to the battery assembly.

8. The retractable tail cap flashlight according to claim 1, characterized in that, The inner wall of the connecting part (12) is provided with a threaded boss (123), and the outer wall of the connecting part (12) is provided with a second threaded hole (122). The second threaded hole (122) penetrates the outer wall of the connecting part (12) and extends into the threaded boss (123). The charging base (3) has a mating hole at its end, and a second bolt is installed in the mating hole. The second bolt passes through the mating hole and the second threaded hole (122) and is threadedly connected to the threaded boss (123).

9. The retractable tail cap flashlight according to claim 1, characterized in that, The number of the spring pieces (33) is two or more, and they are distributed at intervals along the circumference of the charging base (3).

10. The retractable tail cap flashlight according to any one of claims 1 to 9, characterized in that, The cylinder body (1) is a non-cylindrical shell.

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