Self-locking fastener and water sterilization module

Abstract

According to the self-locking fastener and the water sterilization module, the self-locking fastener comprises a connecting piece and a pressing piece, the pressing piece is in threaded connection with the connecting piece, a plurality of elastic pawls are arranged at the lower end of the connecting piece in the circumferential direction, and a plurality of clamping holes matched with the elastic pawls are formed in the pressing piece in the circumferential direction; the free end of the elastic pawl is clamped into the clamping hole, when the pressing piece and the connecting piece are screwed tightly, the elastic pawl and the clamping hole slip, so that the pressing piece and the connecting piece rotate relatively, and when the pressing piece and the connecting piece are unscrewed, the elastic pawl and the clamping hole are clamped to limit relative rotation of the pressing piece and the connecting piece. The LED lamp further comprises a light source assembly and a sealing gasket, the light source assembly is arranged in the connecting piece in a sealed mode, the sealing gasket is pressed between the connecting piece and the pressing piece, the connecting piece and the pressing piece are not prone to loosening after being in threaded connection, and connection reliability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sterilization devices, in particular to a self-locking fastener and a water sterilization module. Background Art

[0002] A water sterilization module is usually arranged in a water tank housing and uses a sterilization lamp for sterilization. For example, a static water sterilization module disclosed in a Chinese patent application (publication number: CN213950663U) includes a lamp holder, a light-transmitting plate, a lamp board, a sterilization lamp, a first sealing ring, a clamping member, and a waterproof potting adhesive. The light-transmitting plate is installed on the lamp holder; the lamp board is installed in the lamp holder; the sterilization lamp is installed on the lamp board, and the inner surface of the lamp board, the inner surface of the light-transmitting plate, and the inner wall of the lamp holder form a sealed cavity for installing the sterilization lamp; the first sealing ring abuts against the outer surface of the lamp board; the clamping member is used to press the first sealing ring and the lamp board; the waterproof potting adhesive is used to pot the base cavity between the outer surface of the lamp board and the lamp holder. It also includes a threaded locking member, and the threaded locking member is a threaded locking cover. The side wall of the threaded locking member is threadedly connected to the outer wall of the lamp holder. The waterproof potting adhesive is located in the inner cavity of the threaded locking member. Since the back of the sterilization lamp is sealed by the first sealing ring and the clamping member, and then the back of the sterilization lamp is integrally sealed by the waterproof potting adhesive, the situation that liquid and water vapor enter the inside of the static water sterilization module is prevented, so that the light of the sterilization lamp can be effectively utilized and the sterilization effect is improved. When installing the above-mentioned static water sterilization module, the end of the threaded locking member abuts against an external structure, and the lamp holder abuts and locks against an external component through an outer waterproof sealing ring. When the threaded locking member is tightened, the outer waterproof sealing ring fits with the external structure to prevent water from entering from the outside. However, in the actual use process, the operating temperature range of the product is between -10°C and 150°C. The plastic shell of the threaded locking member will expand and contract due to temperature changes, resulting in a decrease in the locking force of the threaded locking member and then causing the product to leak water. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a self-locking fastener and a water sterilization module for the defects and deficiencies of the prior art. The structure is simple and reasonable, and the operation is convenient. When the connecting member is connected to the pressing member, the elastic pawl is inserted into the card hole to realize the function of one-way locking, and it is not easy to loosen, ensuring the reliability of the connection.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A self-locking fastener according to the present utility model includes a connecting member and a pressing member. The pressing member is threadedly connected to the connecting member. A plurality of elastic pawls are provided at the lower end of the connecting member along the circumferential direction. A plurality of card holes are provided in the pressing member along the circumferential direction and are matched with the elastic pawls. The free ends of the elastic pawls are snapped into the card holes. When the pressing member and the connecting member are tightened, the elastic pawls and the card holes slip, enabling the relative rotation of the pressing member and the connecting member. When the pressing member and the connecting member are loosened, the elastic pawls and the card holes are locked to limit the relative rotation of the pressing member and the connecting member.

[0006] Further, a plurality of first guiding grooves corresponding to the elastic pawls are also provided at the lower end of the connecting member, and an arc chamfer for transitioning the first guiding grooves is provided on the connecting member.

[0007] Further, the first guiding groove includes a first straight groove portion and a first limiting groove portion communicating with the first straight groove portion. The first straight groove portion extends along the axial direction of the connecting member, and the first limiting groove portion extends along the loosening direction of the connecting member.

[0008] Further, an external thread is provided on the outer wall of the lower end of the connecting member, and an internal thread matching the external thread is provided on the inner wall of the pressing member.

[0009] Based on the above self-locking fastener, a water sterilization module is also provided, including the above self-locking fastener, and further including a light source assembly and a sealing gasket. The light source assembly is sealingly disposed in the connecting member, and the sealing gasket is pressed between the connecting member and the pressing member.

[0010] Further, the light source assembly includes a reflector, a lamp bead, a light-transmitting plate, and a lamp board. The light-transmitting plate, the reflector, and the lamp board are abutted against each other in sequence from top to bottom. A through hole is provided at the center of the reflector. An accommodating cavity is formed between the upper surface of the lamp board, the inner wall of the through hole of the reflector, and the lower surface of the light-transmitting plate. The lamp bead is disposed in the accommodating cavity and is electrically connected to the lamp board.

[0011] Further, a mounting seat is also provided in the connecting member, and the light source assembly is axially limited between the connecting member and the mounting seat.

[0012] Further, a first sealing ring is provided between the mounting seat and the light source assembly.

[0013] Further, a plurality of protrusions are provided on the outer wall of the mounting seat along the circumferential direction, and a plurality of second guiding grooves are provided on the inner wall of the connecting member and are matched with the protrusions.

[0014] Further, a limiting ring groove is provided at the upper end of the connecting member, and a second sealing ring is provided in the limiting ring groove.

[0015] The beneficial effects of the present utility model are as follows: For a self-locking fastening member of the present utility model, several elastic pawls are provided along the circumferential direction at the lower end of the connecting member, which play a role of one-way locking. Several card holes matching with the elastic pawls are provided along the circumferential direction on the pressing member. The free ends of the elastic pawls are snapped into the card holes. When the pressing member and the connecting member are tightened, the elastic pawls and the card holes slip, enabling the pressing member and the connecting member to rotate relative to each other. When the pressing member and the connecting member are loosened, the elastic pawls and the card holes are locked, restricting the relative rotation of the pressing member and the connecting member, so that the connecting member and the pressing member are not prone to loosening after being threadedly connected, ensuring the reliability of the connection; Based on the above self-locking fastening member, a water sterilization module is further provided, which includes the self-locking fastening member, a light source assembly and a sealing gasket. The water sterilization module is installed inside the housing. An installation hole for installing the water sterilization module is provided on the housing. The light source assembly sterilizes the water. The housing is arranged between the sealing gasket and the pressing member. When the pressing member and the connecting member are tightened, the housing and the sealing gasket are squeezed, enabling the sealing gasket to fit more closely with the housing and the connecting member. Moreover, after the pressing member and the connecting member are threadedly connected, the elastic pawls are snapped into the card holes, not prone to loosening, improving the sealing performance and preventing liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the self-locking fastening member;

[0017] Figure 2 is an exploded structural diagram of the self-locking fastening member;

[0018] Figure 3 is a schematic structural diagram when the water sterilization module is installed with the housing;

[0019] Figure 4 is a sectional structural diagram when the water sterilization module is installed with the housing;

[0020] Figure 5 is Figure 4 an enlarged structural diagram of part A in

[0021] Figure 6 is an exploded structural diagram of the water sterilization module;

[0022] Figure 7 is a schematic structural diagram of the mounting base;

[0023] Figure 8 is a schematic structural diagram of the connecting member.

[0024] Figures 1-8In the figure: 1. Connecting piece; 11. Elastic ratchet; 12. First guiding groove; 121. First straight groove part; 122. First limiting groove part; 13. External thread; 14. Second guiding groove; 141. Second straight groove part; 142. Second limiting groove part; 15. Limiting ring groove; 16. Arc chamfer; 2. Pressing piece; 21. Card hole; 22. Internal thread; 3. Light source assembly; 31. Reflecting piece; 311. Through hole; 32. Lamp bead; 33. Translucent plate; 34. Lamp board; 35. Accommodating cavity; 4. Sealing gasket; 5. First sealing ring; 6. Mounting seat; 61. Protrusion; 7. Second sealing ring; 8. Housing. Detailed implementation manner

[0025] The present utility model will be further described below with reference to the accompanying drawings.

[0026] As Figures 1-2 shown, a self-locking fastening part includes a connecting piece 1 and a pressing piece 2. The pressing piece 2 is threadedly connected to the connecting piece 1. Preferably, in this embodiment, an external thread 13 is provided on the outer wall of the lower end of the connecting piece 1, and an internal thread 22 matching the external thread 13 is provided on the inner wall of the pressing piece 2, making the connection between the connecting piece 1 and the pressing piece 2 more firm and stable. A plurality of elastic ratchets 11 are provided along the circumferential direction at the lower end of the connecting piece 1 to play a role of one-way locking. A plurality of card holes 21 matching the elastic ratchets 11 are provided along the circumferential direction on the pressing piece 2. The free end of the elastic ratchet 11 is caught in the card hole 21. When the pressing piece 2 and the connecting piece 1 are tightened, the elastic ratchet 11 slips with the card hole 21, enabling the pressing piece 2 and the connecting piece 1 to rotate relative to each other. When the pressing piece 2 and the connecting piece 1 are loosened, the elastic ratchet 11 is locked with the card hole 21, restricting the relative rotation of the pressing piece 2 and the connecting piece 1, so that the connecting piece 1 and the pressing piece 2 are not likely to become loose after being threadedly connected, ensuring the reliability of the connection.

[0027] Preferably, a plurality of first guiding grooves 12 corresponding to the elastic ratchets 11 are further provided at the lower end of the connecting piece 1, and an arc chamfer 16 for transitioning the first guiding grooves 12 is provided on the connecting piece 1. When the pressing piece 2 and the connecting piece 1 are tightened, the elastic ratchet 11 is more likely to slip with the card hole 21, and the arc chamfer 16 can also reduce wear. The first guiding groove 12 includes a first straight groove part 121 and a first limiting groove part 122 communicating with the first straight groove part 121. The first straight groove part 121 extends along the axis direction of the connecting piece 1, and the first limiting groove part 122 extends along the loosening direction of the connecting piece 1. By providing the first guiding groove 12, the elastic ratchet 11 is more likely to be caught in the card hole 21. When the pressing piece 2 and the connecting piece 1 are loosened, the elastic ratchet 11 is locked with the card hole 21, and the one-way locking function is achieved through the limitation of the first limiting groove part 122.

[0028] Preferably, in this embodiment, two elastic pawls 11 are provided to further improve the connection reliability. Of course, in other embodiments, there can be three, four, etc.

[0029] Based on the above self-locking fastener, there is also provided a Figures 3-8 shown water sterilization module, which includes a self-locking fastener, and also includes a light source assembly 3 and a gasket 4. The light source assembly 3 is hermetically arranged in the connecting piece 1. The gasket 4 is pressed between the connecting piece 1 and the pressing piece 2. The water sterilization module is installed in the housing 8. The housing 8 is provided with an installation hole for installing the water sterilization module. Usually, water is filled in the housing 8. The light source assembly 3 sterilizes the water. The housing 8 is arranged between the gasket 4 and the pressing piece 2. When the pressing piece 2 and the connecting piece 1 are tightened, the housing 8 and the gasket 4 are extruded, so that the gasket 4 can fit more closely with the housing 8 and the connecting piece 1, improving the sealing performance and preventing liquid leakage.

[0030] Preferably, in this embodiment, referring to Figures 5-6 , the light source assembly 3 includes a reflector 31, a lamp bead 32, a light-transmitting plate 33 and a lamp board 34. The light-transmitting plate 33, the reflector 31 and the lamp board 34 are abutted in sequence from top to bottom. A through hole 311 is provided at the center of the reflector 31. An accommodation cavity 35 is formed between the upper surface of the lamp board 34, the inner wall of the through hole 311 of the reflector 31 and the lower surface of the light-transmitting plate 33. The lamp bead 32 is arranged in the accommodation cavity 35 and is electrically connected to the lamp board 34. The reflector 31 can converge the light of the lamp bead 32 on the lamp board 34. When the lamp bead 32 works, the light source is transmitted through the reflector 31 and the light-transmitting plate 33 to sterilize the water. The lamp bead 32 can specifically adopt a UVLED ultraviolet sterilization light source. The lamp bead 32 can be directly welded on the lamp board 34. When wiring, a wire is provided on the back of the lamp board 34 for supplying power to the lamp bead 32. The light-transmitting plate 33 is a glass plate, specifically a quartz glass sheet. Since the UVC band penetration ability of the quartz glass sheet is the weakest, the quartz glass sheet is the best among all ultraviolet-transmitting materials, improving the sterilization effect of the static water sterilization module.

[0031] Preferably, the lamp bead 32 is arranged close to the light-transmitting plate 33. The closer the lamp bead 32 is to the object to be irradiated, the larger the irradiation range of the lamp bead 32 and the better the sterilization effect.

[0032] Preferably, in this embodiment, an installation seat 6 is further arranged in the connecting piece 1. The light source assembly 3 is axially limited between the connecting piece 1 and the installation seat 6. A first sealing ring 5 is provided between the installation seat 6 and the light source assembly 3. When the installation seat 6 is tightened, the internal components of the water sterilization module can be more fitted. The first sealing ring 5 can protect the internal components from being damaged by the installation seat 6 and can further improve the sealing effect to prevent liquid and water vapor from entering.

[0033] Preferably, in this embodiment, a limiting ring groove 15 is provided at the upper end of the connecting member 1, and a second sealing ring 7 is provided in the limiting ring groove 15 to improve the sealing performance between the light source assembly 3 and the connecting member 1, prevent liquid and water vapor from entering, and the limiting ring groove 15 prevents the second sealing ring 7 from falling off and affecting the sealing effect.

[0034] Preferably, the first sealing ring 5 and the second sealing ring 7 are colored sealing rings. During assembly, it can be confirmed whether the internal first sealing ring 5 and the second sealing ring 7 are omitted during the assembly process, preventing the product from losing its due waterproof effect after omission.

[0035] During installation, first place the second sealing ring 7 in the limiting ring groove 15, then install the light source assembly 3 into the connecting member 1, and then put the first sealing ring 5 in. Tighten and fix it through the mounting seat 6. When the mounting seat 6 is tightened, the internal components of the water sterilization module can be more closely attached, and the gasket 4 and the housing 8 are pressed between the connecting member 1 and the pressing member 2.

[0036] Preferably, in this embodiment, refer to Figure 7 , a plurality of protrusions 61 are provided on the outer wall of the mounting seat 6 along the circumferential direction. Refer to Figure 8 , a plurality of second guiding grooves 14 that cooperate with the protrusions 61 are provided on the inner wall of the connecting member 1. Preferably, in this embodiment, the second guiding groove 14 includes a second straight groove portion 141 and a second limiting groove portion 142. The second straight groove portion 141 extends along the axial direction of the connecting member 1, and the second limiting groove portion 142 extends along the tightening direction of the mounting seat 6. During installation, the protrusion 61 is aligned with the second straight groove portion 141. When the protrusion 61 passes through the second straight groove portion 141 and then turns a little to enter the second limiting groove portion 142, the function of one-way locking is realized, making it difficult for the mounting seat 6 to become loose from the connecting member 1 and improving the reliability of the connection.

[0037] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A self-locking fastener, comprising a connecting member (1) and a pressing member (2), wherein the pressing member (2) is threadedly connected to the connecting member (1), characterized in that: The lower end of the connecting member (1) is provided with a plurality of elastic pawls (11) along the circumferential direction, and the pressing member (2) is provided with a plurality of clamping holes (21) matching with the elastic pawls (11) along the circumferential direction. The free ends of the elastic pawls (11) are clamped into the clamping holes (21). When the clamping member (2) and the connecting member (1) are tightened, the elastic pawls (11) and the clamping holes (21) slip, so that the pressing member (2) and the connecting member (1) rotate relative to each other. When the clamping member (2) and the connecting member (1) are loosened, the elastic pawls (11) and the clamping holes (21) are clamped, so that the pressing member (2) and the connecting member (1) rotate relative to each other.

2. A self-locking fastener according to claim 1, characterized in that: The lower end of the connecting member (1) is also provided with a plurality of first guide grooves (12) corresponding to the elastic pawls (11), and the connecting member (1) is provided with an arc chamfer (16) for transitioning the first guide grooves (12).

3. A self-locking fastener according to claim 2, characterized in that: The first guide groove (12) comprises a first straight groove portion (121) and a first limiting groove portion (122) connected to the first straight groove portion (121), the first straight groove portion (121) extending along the axial direction of the connecting member (1), and the first limiting groove portion (122) extending along the direction in which the connecting member (1) is loosened.

4. A self-locking fastener according to claim 1, characterized in that: The outer wall of the lower end of the connecting member (1) is provided with an external thread (13), and the inner wall of the pressing member (2) is provided with an internal thread (22) matching the external thread (13).

5. A water sterilization module, characterized in that: It comprises a self-locking fastener as claimed in any one of claims 1 to 4, and further comprises a light source assembly (3) and a sealing gasket (4), wherein the light source assembly (3) is sealingly arranged in the connecting member (1), and the sealing gasket (4) is compressed between the connecting member (1) and the pressing member (2).

6. A water sterilization module according to claim 5, characterized in that: The light source assembly (3) comprises a reflector (31), a lamp bead (32), a light-transmitting plate (33) and a light board (34); the light-transmitting plate (33), the reflector (31) and the light board (34) are abutted in sequence from top to bottom; a through hole (311) is provided at the center of the reflector (31); an accommodating cavity (35) is formed between the upper surface of the light board (34), the inner wall of the through hole (311) of the reflector (31) and the lower surface of the light-transmitting plate (33); the lamp bead (32) is arranged in the accommodating cavity (35) and is electrically connected to the light board (34).

7. A water sterilization module according to claim 5, characterized in that: A mounting seat (6) is also provided in the connecting member (1), and the light source assembly (3) is axially limited between the connecting member (1) and the mounting seat (6).

8. A water sterilization module according to claim 7, characterized in that: A first sealing ring (5) is disposed between the mounting seat (6) and the light source assembly (3).

9. A water sterilization module according to claim 7, characterized in that: The outer wall of the mounting seat (6) is provided with a plurality of protrusions (61) along the circumferential direction, and the inner wall of the connecting member (1) is provided with a plurality of second guide grooves (14) matching with the protrusions (61).

10. A water sterilization module according to claim 5, characterized in that: A limiting ring groove (15) is provided at the upper end of the connecting member (1), and a second sealing ring (7) is provided in the limiting ring groove (15).

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