A snail electric horn

Abstract

The utility model discloses a snail electric horn, including casing, diaphragm, electromagnetic system, contact arm group and adjusting screw subassembly, the casing is constituted by bottom disc and the upper cover of taking the horn barrel, and the diaphragm is located between both, the contact arm group contains the upper and lower contact arm and corresponding contact on the bottom disc, and adjusting screw subassembly includes screw seat and self -tapping screw, and the bottom disc is provided with fixed hole of inner wall with spacing plane A, and the locking portion of screw seat upper end is surrounded by multivalve elastic dog, and its outer wall is equipped with the spacing plane B of adaptation, after locking portion inserts fixed hole, two spacing planes abut and prevent screw seat from rotating, and self -tapping screw is spun into screw hole and abuts the upper contact arm, and elastic dog opens with fixed hole and abuts the fixed position with the rotation. The scheme cancels rubber spring, and simplifies the structure, reduces the part, realizes the steady installation of screw seat, reduces the horn volume simultaneously, reduces the cost, and promotes the assembly and use performance.

Description

Technical Field

[0001] This utility model relates to the field of automobile horn technology, and in particular to a snail-shaped electric horn. Background Technology

[0002] The snail-shaped electric horn, a mandatory audible warning device for motor vehicles, works by using a coil's magnetic field to drive a moving iron core, which in turn vibrates a diaphragm. This vibration, combined with a horn tube, amplifies the sound to achieve the warning function, making it widely applicable to various vehicle types. CN222803008U discloses a high-durability mechanical snail-shaped electric horn, comprising a housing, a diaphragm, and within the housing are a moving iron core, a stationary iron core, a moving contact arm, a stationary contact arm, a coil, and a mounting panel. The stationary and moving contact arms are mounted on the mounting panel using rivet A. One end of the stationary contact arm, an insulating sheet, and one end of the moving contact arm are riveted to the mounting panel via rivet A and fixed to the housing. The other end of the stationary contact arm is also fixedly connected to the housing via an adjusting screw and a rubber spring. Since the horn's operating current needs to be adjusted by changing the vertical position of the moving contact arm, the adjusting screw uses a "threaded fit + rubber spring support" design: a tapped hole is made in the contact arm, the screw is threaded into the tapped hole, and a rubber spring is provided below the contact arm for support. The structure has two major drawbacks: First, the large number of parts and the addition of rubber springs to support the screws not only increase production costs but also make the overall size of the horn too large due to the space occupied by the assembly of each part, thus exacerbating the risk of interference with surrounding components. Second, the screws and contact arms require a reserved exposed length to ensure adjustment margin, which further occupies axial space. Moreover, the rubber springs are prone to aging and failure after long-term use, causing the contact arms to shift position and affecting the stability of the horn's operation. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a snail electric horn that can adjust the horn's working current through the adjusting screw assembly while achieving a stable installation of the adjusting screw assembly.

[0004] The technical solution of this utility model is as follows: a snail electric horn, comprising a housing, a diaphragm, an electromagnetic system, and a contact arm assembly. The housing is formed by a chassis and a top cover with a horn tube. The diaphragm is disposed between the chassis and the top cover. The contact arm assembly includes an upper contact arm and a lower contact arm disposed on the chassis, with corresponding contacts on the upper and lower contact arms. It also includes an adjusting screw assembly for adjusting the position of the upper contact arm, the adjusting screw assembly including a screw seat and a self-tapping screw. The chassis has a fixing hole, and the inner wall of the fixing hole has a limiting plane A; the upper end of the screw seat has a locking part that can be inserted into the fixing hole. The locking part is formed by a multi-lobed elastic claw, and the enclosing area of ​​the multi-lobed elastic claw constitutes the screw hole. The outer wall of the elastic claw has a limiting plane B that is adapted to the limiting plane A. After the locking part of the screw seat is inserted into the fixing hole, the limiting plane A and the limiting plane B abut against each other to restrict the rotation of the screw seat. The shank of the self-tapping screw is screwed upward along the axis into the screw hole of the screw seat, and its upper end abuts against one end of the upper contact arm. The multi-lobed elastic claw of the locking part is opened as the self-tapping screw is screwed in to abut against the inner wall of the fixing hole for positioning.

[0005] By adopting the above technical solution, an "adjusting screw assembly + chassis fixing hole limiting structure" is added. The contact between limiting plane A and limiting plane B prevents the screw seat from rotating. The elastic claw expands as the self-tapping screw is driven in and tightens against the fixing hole, achieving rapid positioning and stable installation of the adjusting screw assembly. The rubber spring is eliminated; the position of the upper contact arm is fixed directly by the contact between the self-tapping screw and the upper contact arm. The vertical position of the upper contact arm can be adjusted by the screw's insertion depth, thereby regulating the horn's operating current. Controlling the operating current allows for control of the snail horn's volume. Because the elastic claw has a certain amount of rebound, the diameter of the screw hole is set to be less than or equal to the diameter of the rod. When the rod extends into the hole, initially, because the rod's diameter is greater than or equal to the screw hole's diameter, the elastic claw moves away from the center of the adjusting screw assembly. Then, as the elastic claw's rebound gradually increases, it moves closer to the center of the adjusting screw assembly, thus tightening and surrounding the rod, achieving stable installation of the adjusting screw assembly. This invention, a snail-shaped electric horn, simplifies the structure, reduces the number of parts, and achieves a stable screw base, thereby reducing the overall size of the horn and lowering costs.

[0006] A further feature of this invention is that the multi-lobed elastic claws are evenly spaced along the circumference of the screw seat, and the lower ends of the elastic claws are integrally connected to the screw seat.

[0007] With the above-mentioned further design, the multi-lobed elastic claws are evenly distributed around the screw seat, which makes the force exerted on the inner wall of the fixing hole more uniform when the elastic claws are opened, avoiding excessive local force that could cause deformation of the fixing hole. The lower end of the elastic claws is integrally connected to the screw seat, reducing the risk of loosening and extending the service life.

[0008] A further feature of this invention is that the fixing hole is a square hole, and the locking part is a square structure adapted to the square hole.

[0009] By further modifying the above-mentioned design, the fixing hole is made into a square hole and the locking part is made into a matching square structure. Compared with the circular structure, the square fit can directly achieve the anti-rotation limit of the screw seat without the need to set an additional limiting plane, which simplifies the processing technology.

[0010] A further feature of this invention is that the locking part is configured as a four-lobed elastic claw.

[0011] With the above-mentioned further design, the four-lobed elastic claws ensure sufficient fixing force after expansion, while also making it easy to control the consistency of elastic deformation of each claw, thus avoiding instability caused by abnormal deformation of a single claw.

[0012] A further feature of this invention is that the inner wall of the elastic claw has a mating surface that can abut against a self-tapping screw, and this mating surface is provided with an inward arc-shaped protrusion.

[0013] With the above-mentioned further design, the arc-shaped protrusion mating surface of the inner wall of the elastic claw can form a higher degree of contact with the threaded surface of the self-tapping screw, preventing the self-tapping screw from loosening under long-term vibration environment and ensuring the stability of the position after the contact spacing is adjusted.

[0014] A further feature of this invention is that the outer wall of the screw seat has an outer stepped surface, which abuts against the lower end surface of the chassis to limit the screw seat; the inner wall of the screw seat has an inner stepped surface, which abuts against the upper end of the head of the self-tapping screw to limit the self-tapping screw.

[0015] With the above-mentioned further configuration, the outer stepped surface of the screw seat abuts against the lower end face of the chassis, which can precisely limit the axial installation position of the screw seat and avoid the installation being too deep or too shallow, thus affecting the adjustment effect; the inner stepped surface of the inner wall abuts against the head of the self-tapping screw, which can prevent the self-tapping screw from being over-screwed, causing the upper contact arm to be deformed under pressure, while avoiding insufficient screwing, which would affect the abutment stability, thus achieving double limit protection and improving structural safety and adjustment reliability.

[0016] A further feature of this invention is as follows: the upper cover has a sound channel on one side of the corresponding chassis, the center of the sound channel is a sound hole, and the outer end is connected to the speaker tube. A positioning plate that can seal the sound channel is provided below the upper cover. The outer ring of the positioning plate is sealed with the outer ring of the upper cover, and its inner ring has a sound inlet at the position corresponding to the sound hole. The inner ring of the diaphragm is connected and fixed to the moving iron core of the electromagnetic system, and its outer ring is pressed and fixed by the positioning plate.

[0017] With the above-mentioned further configuration, the sound channel of the top cover is connected to the speaker tube, which can guide the sound generated by the diaphragm vibration to propagate in a directional manner, reduce sound diffusion loss, and improve the speaker volume and propagation distance. The positioning plate can seal the sound channel to prevent external impurities from entering the sound channel and affecting the sound quality. On the other hand, by pressing the outer ring of the diaphragm with the positioning plate, it can ensure that the edge of the diaphragm is subjected to uniform force, reduce edge deformation during vibration, and improve the consistency of sound quality. The inner ring of the diaphragm is connected to the moving iron core, and the outer ring is fixed by the positioning plate, which makes the diaphragm vibration more stable and avoids noise problems caused by abnormal local vibration.

[0018] A further feature of this invention is that the outer ring of the upper end of the chassis is bent outward to form a flange; the outer ring of the positioning plate is bent inward to form an annular clamping groove with an inner opening; the flange of the chassis and the outer ring of the diaphragm are both inserted into the clamping groove, and a first sealing element is provided between the outer ring of the diaphragm and the flange of the chassis.

[0019] With the above-mentioned further configuration, both the chassis flange and the outer ring of the diaphragm are inserted into the clamping groove, which can realize the rapid positioning and assembly of the chassis, diaphragm and positioning plate, and improve production efficiency; the first seal between the outer ring of the diaphragm and the chassis flange can prevent external dust, moisture and other substances from entering the speaker, and avoid functional failure caused by moisture or contamination of the electromagnetic system or contact arm assembly.

[0020] A further feature of this invention is as follows: the electromagnetic system includes a moving iron core, a stationary iron core, a frame, and a coil wound on the frame. The frame is mounted on a chassis. The upper end of the moving iron core has a shaft head. The inner ring of the diaphragm is sleeved outside the shaft head and pressed by a pressure ring. A second sealing element is provided between the upper surface of the diaphragm and the pressure ring, and a third sealing element is provided between the lower surface of the diaphragm and the moving iron core.

[0021] With the above-mentioned further configuration, the moving iron core and stationary iron core of the electromagnetic system, in conjunction with the coil, can generate a stable electromagnetic attraction, ensuring the stability of the diaphragm vibration frequency and improving the stability of sound quality; the fit between the moving iron core shaft and the inner ring of the diaphragm, as well as the pressing and fixing of the pressure ring, can prevent vibration deviation caused by loose connection between the diaphragm and the moving iron core; the second seal between the diaphragm and the pressure ring, and the third seal between the diaphragm and the moving iron core, can prevent external dust, moisture, etc. from entering, protecting the electromagnetic system or contact arm assembly.

[0022] A further feature of this invention is that the sound channel is curved.

[0023] By adopting the above-mentioned further settings, the curved channel setting, compared with the straight channel, can extend the sound propagation path, so that the sound can form a certain resonance within the channel, enhancing the fullness and penetration of the sound. Attached Figure Description

[0024] Figure 1 This is a structural diagram of a specific embodiment of the present utility model; Figure 2 This is an internal structural diagram of a specific embodiment of the present utility model; Figure 3 This is an internal structural diagram of a specific embodiment of the present utility model; Figure 4 This is an assembly diagram of the top cover and positioning plate according to a specific embodiment of the present utility model; Figure 5 This is a structural diagram of the upper cover of a specific embodiment of the present utility model; Figure 6This is an assembly diagram of the chassis and diaphragm according to a specific embodiment of the present utility model; Figure 7 This is a chassis structure diagram of a specific embodiment of the present utility model; Figure 8 This is a structural diagram of the adjusting screw assembly according to a specific embodiment of the present utility model; Figure 9 This is a structural diagram of the screw seat according to a specific embodiment of the present utility model; Figure 10 This is a structural diagram of the screw seat according to a specific embodiment of the present utility model; Figure 11 This is a cross-sectional view of the positioning disk according to a specific embodiment of the present utility model; Figure 12 This is a cross-sectional view of the diaphragm in a specific embodiment of the present invention.

[0025] In the diagram: 1. Housing; 2. Diaphragm; 3. Electromagnetic system; 4. Contact arm assembly; 11. Chassis; 12. Top cover; 121. Speaker tube; 41. Upper contact arm; 42. Lower contact arm; 5. Adjusting screw assembly; 51. Screw seat; 52. Self-tapping screw; 111. Fixing hole; A1111. Limiting plane; 511. Locking part; 511. Elastic claw; 5111. Screw hole; 5112. Limiting plane; B51111. Rod part; 521. Mating surface; 51112. Outer stepped surface; 512. Inner stepped surface; 513. Head; 522. Sound channel; 122. Sound hole; 1221. Positioning plate; 6. Sound inlet; 61. Flanged edge; 62. Clamping groove; 7. First seal; 31. Moving iron core; 32. Stationary iron core; 33. Frame; 34. Coil; 311. Shaft head; 8. Pressure ring; 9. Second seal; 10. Third seal. Detailed Implementation

[0026] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figure 1-12As shown, this utility model discloses a snail-shaped electric horn, comprising a housing 1, a diaphragm 2, an electromagnetic system 3, and a contact arm assembly 4. The electromagnetic system 3 is a conventional design, comprising a moving iron core 31, a stationary iron core 32, a frame 33, and a coil 34 wound on the frame 33. The frame 33 is mounted on a chassis 11. The upper end of the moving iron core 31 has a shaft head 311. The inner ring of the diaphragm 2 is fitted outside the shaft head 311 and pressed by a pressure ring 8. A second sealing element 9 is provided between the upper surface of the diaphragm 2 and the pressure ring 8. The lower surface of the diaphragm 2 is sealed to the moving iron core 31. A third sealing element 10 is provided between the iron cores 31; the housing 1 is formed by the cooperation of the chassis 11 and the upper cover 12 with the horn tube 121. The chassis 11 and the upper cover 12 can be fixed by screws. The diaphragm 2 is provided between the chassis 11 and the upper cover 12. The contact arm assembly 4 includes an upper contact arm 41 and a lower contact arm 42 provided on the chassis 11. The upper contact arm 41 and the lower contact arm 42 are provided with corresponding contacts. It also includes an adjusting screw assembly 5 for adjusting the position of the upper contact arm. The adjusting screw assembly 5 includes a screw seat 51 and a self-tapping screw 52. The chassis 11 has a fixing hole 111, and the inner wall of the fixing hole 111 has a limiting plane A1111; the upper end of the screw seat 51 has a locking part 511 that can be inserted into the fixing hole 111. The locking part 511 is formed by multiple elastic claws 5111, and the enclosing area of ​​the multiple elastic claws 5111 forms a screw hole 5112. The outer wall of the elastic claws 5111 has a limiting plane B51111 that is adapted to the limiting plane A1111. After the locking part 511 of the screw seat is inserted into the fixing hole 111, the limiting plane A1111 and the limiting plane B51111 abut against each other to restrict the rotation of the screw seat 51. The shank 521 of the self-tapping screw 52 is screwed upward along the axial direction into the screw hole 5112 of the screw seat 51, and its upper end abuts against one end of the upper contact arm 41. The multi-lobed elastic claws 5111 of the locking part 511 are opened as the self-tapping screw 52 is screwed in to abut against the inner wall of the fixing hole 111 for positioning.

[0028] Specifically, the multi-lobed elastic claws 5111 are evenly spaced along the circumference of the screw seat 51, and the lower ends of the elastic claws 5111 are integrally connected to the screw seat 51. The fixing hole 111 is a square hole, and the locking part 511 is a square structure adapted to the square hole. The locking part 511 is provided with four elastic claws 5111. The inner wall of the elastic claws 5111 has a mating surface 51112 that can abut against the self-tapping screw 52, ​​and the mating surface 51112 is provided with an inward arc-shaped protrusion. The outer wall of the screw seat 51 has an outer stepped surface 512, which abuts against the lower end surface of the chassis 11 to limit the screw seat 51; the inner wall of the screw seat 51 has an inner stepped surface 513, which abuts against the upper end of the head 522 of the self-tapping screw 52 to limit the self-tapping screw 52.

[0029] Specifically, the upper cover 12 has a sound channel 122 on one side corresponding to the chassis. The sound channel 122 is curved, with a sound hole 1221 at its center and its outer end connected to the speaker tube 121. A positioning plate 6 is provided below the upper cover 12 to seal the sound channel 122. The outer ring of the positioning plate 6 is sealed to the outer ring of the upper cover 12, and its inner ring has a sound inlet 61 at the position corresponding to the sound hole 1221. The inner ring of the diaphragm 2 is connected and fixed to the moving iron core 31 of the electromagnetic system 3, and its outer ring is pressed and fixed by the positioning plate 6. The outer ring of the upper end of the chassis 11 is bent outward to form a flange 112; the outer ring of the positioning plate 6 is bent inward to form an annular groove 62 with an inner opening. The chassis flange 112 and the outer ring of the diaphragm 2 are both inserted into the groove 62, and a first sealing element 7 is provided between the outer ring of the diaphragm 2 and the chassis flange 112.

[0030] When installing the adjusting screw assembly, insert the locking part of the screw seat into the fixing hole of the chassis, so that the limiting plane A of the inner wall of the fixing hole and the limiting plane B of the outer wall of the elastic claw of the locking part are in close contact to restrict the rotation of the screw seat, and the outer stepped surface of the outer wall of the screw seat is in contact with the chassis; then screw the shank of the self-tapping screw axially upward into the screw hole of the screw seat until the upper end of the screw is in contact with one end of the upper contact arm. At this time, the elastic claw is opened and is in close contact with the inner wall of the fixing hole, and the screw head is in contact with the inner stepped surface of the inner wall of the screw seat for positioning, thus completing the installation of the adjusting screw assembly and ensuring smooth adjustment of the self-tapping screw.

[0031] When the snail-shaped electric horn of this product is powered on, the coil generates a magnetic field, the contacts of the upper and lower contact arms close, the moving iron core attracts the stationary iron core, and the moving iron core carries the diaphragm downward; then the contacts of the upper and lower contact arms open, the moving iron core carries the diaphragm upward to reset, and the diaphragm generates reciprocating high-frequency vibration. The vibration is transmitted to the upper cover channel through the sound inlet of the positioning plate. After the sound channel is optimized and transmitted, it is further amplified by the horn tube, and finally emits a clear and loud horn sound.

[0032] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical 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 utility model based on the specific circumstances.

Claims

1. A snail-shaped electric horn, comprising a housing (1), a diaphragm (2), an electromagnetic system (3), and a contact arm assembly (4), wherein the housing (1) is formed by a chassis (11) and a top cover (12) with a horn tube (121), the diaphragm (2) is disposed between the chassis (11) and the top cover (12), and the contact arm assembly (4) comprises an upper contact arm (41) and a lower contact arm (42) disposed on the chassis (11), wherein the upper contact arm (41) and the lower contact arm (42) are provided with corresponding contacts, characterized in that: It also includes an adjusting screw assembly (5) for adjusting the position of the upper contact arm, the adjusting screw assembly (5) including a screw seat (51) and a self-tapping screw (52). The chassis (11) has a fixing hole (111) and a limiting plane A (1111) is provided on the inner wall of the fixing hole (111). The upper end of the screw seat (51) is provided with a locking part (511) that can be inserted into the fixing hole (111). The locking part (511) is formed by a multi-lobed elastic claw (5111), and the enclosing area of ​​the multi-lobed elastic claw (5111) constitutes a screw hole (5112). The outer wall of the elastic claw (5111) is provided with a limiting plane B (51111) that is adapted to the limiting plane A (1111). After the locking part (511) of the screw seat is inserted into the fixing hole (111), the limiting plane A (1111) and the limiting plane B (51111) abut against each other to restrict the rotation of the screw seat (51). The shank (521) of the self-tapping screw (52) is screwed upward along the axis into the screw hole (5112) of the screw seat (51), and its upper end abuts against one end of the upper contact arm (41). The multi-lobed elastic claw (5111) of the locking part (511) is opened as the self-tapping screw (52) is screwed in to abut against the inner wall of the fixing hole (111) for positioning.

2. The snail-shaped electric horn according to claim 1, characterized in that: The multi-lobed elastic claws (5111) are evenly spaced along the circumference of the screw seat (51), and the lower end of the elastic claws (5111) is integrally connected to the screw seat (51).

3. The snail-shaped electric horn according to claim 1, characterized in that: The fixing hole (111) is a square hole, and the locking part (511) is a square structure adapted to the square hole.

4. The snail-shaped electric horn according to claim 3, characterized in that: The locking part (511) is provided with four elastic claws (5111).

5. The snail-shaped electric horn according to claim 1, 2, 3, or 4, characterized in that: The inner wall of the elastic claw (5111) has a mating surface (51112) that can abut against the self-tapping screw (52), and the mating surface (51112) is provided to be arc-shaped protrusion inward.

6. The snail-shaped electric horn according to claim 1, 2, 3, or 4, characterized in that: The outer wall of the screw seat (51) has an outer stepped surface (512), which abuts against the lower end surface of the chassis (11) to limit the screw seat (51); the inner wall of the screw seat (51) has an inner stepped surface (513), which abuts against the upper end of the head (522) of the self-tapping screw (52) to limit the self-tapping screw (52).

7. The snail-shaped electric horn according to claim 1, 2, 3, or 4, characterized in that: The upper cover (12) has a sound channel (122) on one side of the corresponding chassis. The center of the sound channel (122) is a sound hole (1221) and the outer end is connected to the speaker tube (121). The upper cover (12) is provided with a positioning plate (6) that can seal the sound channel (122). The outer ring of the positioning plate (6) is sealed with the outer ring of the upper cover (12), and its inner ring has a sound inlet (61) at the position corresponding to the sound hole (1221). The inner ring of the diaphragm (2) is connected and fixed to the moving iron core (31) of the electromagnetic system (3), and its outer ring is pressed and fixed by the positioning plate (6).

8. The snail-shaped electric horn according to claim 7, characterized in that: The outer ring of the upper end of the chassis (11) is bent outward to form a flange (112); the outer ring of the positioning disk (6) is bent inward to form an annular groove (62) with an inner opening. The flange (112) of the chassis and the outer ring of the diaphragm (2) are both inserted into the groove (62), and a first sealing element (7) is provided between the outer ring of the diaphragm (2) and the flange (112) of the chassis.

9. The snail-shaped electric horn according to claim 7, characterized in that: The electromagnetic system (3) includes a moving iron core (31), a stationary iron core (32), a frame (33), and a coil (34) wound on the frame (33). The frame (33) is mounted on the chassis (11). The upper end of the moving iron core (31) has a shaft head (311). The inner ring of the diaphragm (2) is fitted outside the shaft head (311) and pressed by a pressure ring (8). A second sealing element (9) is provided between the upper surface of the diaphragm (2) and the pressure ring (8). A third sealing element (10) is provided between the lower surface of the diaphragm (2) and the moving iron core (31).

10. The snail-shaped electric horn according to claim 7, characterized in that: The vocal tract (122) is arranged in a curved shape.

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