Inner rear-view mirror capable of reducing abnormal sound

Abstract

The utility model provides an inside rear-view mirror capable of reducing abnormal sound, which comprises a lens, a transition plate and a shell, the lens is fixed on the transition plate, a sound attenuation piece is arranged on a matching surface of the transition plate and the shell, or a sound attenuation piece is arranged on a matching surface of the shell and the transition plate; and after the transition plate is connected with the shell, the silencing piece is clamped between the transition plate and the shell. The noise reduction piece is arranged on the matching surface of the transition plate and the shell and is clamped between the transition plate and the shell during assembly, a matching gap is eliminated, a vibration transmission path is blocked and matching errors caused by assembly tolerance are absorbed through the filling effect of the noise reduction piece, high-frequency collision abnormal sound is effectively reduced by more than 80%, an original buckle structure does not need to be changed, and the noise reduction structure is compatible with an existing production process.

Description

Technical Field

[0001] This utility model relates to the field of rearview mirror technology, and in particular to an interior rearview mirror that reduces abnormal noise. Background Technology

[0002] In today's society, automobiles have gradually become an essential means of transportation for families, and competition among OEMs is becoming increasingly fierce. Although new technologies are constantly emerging and traditional technologies are constantly being updated, the sheer number of parts in a car, including thousands, means that abnormal noises from these parts remain a top priority for OEMs. These noises directly impact the subjective experience of drivers and passengers, and addressing or reducing them has become a powerful way for OEMs and parts suppliers to enhance their market competitiveness. In the current automotive field, the rearview mirror is one of the essential safety components. It consists of a lens, a transition plate, and a housing. The main assembly steps are as follows: the lens is fixed to the transition plate with double-sided adhesive, and then the lens-transition plate assembly is assembled with the housing to form the rearview mirror. This solution has the following limitations: the lens-transition plate assembly and the housing are usually fastened together with snaps. Due to tolerances at the mating points of the transition plate and the housing, there will inevitably be gaps between them. When subjected to extreme vibrations, the mating surfaces of the housing and the transition plate may come into contact, resulting in abnormal noises. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide an interior rearview mirror that reduces abnormal noise.

[0004] This utility model is achieved by the following method: an interior rearview mirror that reduces abnormal noise, including a lens, a transition plate and a housing, wherein the lens is fixed to the transition plate, and a sound-absorbing component is provided on the mating surface of the transition plate and the housing, or the sound-absorbing component is provided on the mating surface of the housing and the transition plate; after the transition plate and the housing are connected, the sound-absorbing component is sandwiched between the transition plate and the housing.

[0005] Preferably, the noise-reducing component is an elastic component.

[0006] Preferably, the elastic element is a silicone ring, which is disposed on the end face of the housing that mates with the transition plate.

[0007] Preferably, the silicone ring and the housing are integrally formed by two-color injection molding.

[0008] Preferably, the silicone ring protrudes from the end face of the housing, and the protrusion direction is opposite to the fastening direction of the transition plate and the housing.

[0009] Preferably, the inner circumferential dimension of the silicone ring is smaller than the dimension of the transition plate that fits into the inner circumferential surface of the housing.

[0010] Preferably, the inner circumferential surface of the silicone ring gradually decreases in size from the end furthest from the housing to the end closest to the housing.

[0011] Preferably, the housing and the transition plate are interference-fitted or transition-fitted.

[0012] Preferably, the transition plate has a film on the surface of the end facing away from the housing, and the lens is bonded to the film.

[0013] The beneficial effects of this utility model are as follows: This utility model provides an interior rearview mirror that reduces abnormal noise. Compared with the prior art, this utility model has at least the following technical effects: 1. A sound-absorbing component is provided on the mating surface of the transition plate and the housing. During assembly, the sound-absorbing component is sandwiched between them. The filling effect of the sound-absorbing component eliminates the mating gap, blocks the vibration transmission path, absorbs the mating error caused by assembly tolerance, and effectively reduces high-frequency collision noise by more than 80%. It does not require changing the original buckle structure and is compatible with existing production processes. 2. The elastic component can elastically deform to eliminate the gap between the housing and the transition plate and avoid relative movement between the two. 3. A silicone ring is set on the end face of the housing to facilitate the compression deformation of the housing and the transition plate so that the buckle can be fastened. In order for the buckle to deform and fit into the buckle, the buckle usually leaves a deformation allowance. After fastening, this allowance will become the gap for mutual movement and collision. The presence of the silicone ring can push the transition plate in the opposite direction after fastening, thereby making the buckle press against the surface of the buckle, eliminating the gap generated after the two are fastened, and thus eliminating the abnormal noise generated by the collision. 4. The silicone ring and housing are integrally injection molded in two colors, increasing the bonding strength by 300% (peel force > 50N / cm) and reducing individual assembly steps (saving 15 seconds per piece). 5. The silicone ring's reverse protruding design facilitates compression between the housing and transition plate, eliminating gaps. 6. The inner circumference of the silicone ring is smaller than the transition plate, facilitating its insertion and providing initial preload to both the housing and transition plate. 7. The silicone ring's inner conical surface design, with a 3°-5° taper angle, achieves self-centering and prevents the transition plate from wobbling relative to the housing, further reducing noise. 8. Interference / transition fittings facilitate a secure connection between the housing and transition plate. 9. The lens and transition plate are glued together, preventing rattling. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the components of an interior rearview mirror that reduces abnormal noise according to this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of an interior rearview mirror that reduces abnormal noise according to this utility model.

[0016] The following are the symbols in the attached diagram: 1. Lens; 2. Film; 3. Transition plate; 4. Silicone ring; 5. Housing. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Please see Figures 1 to 2 An interior rearview mirror designed to reduce noise includes a lens 1, a transition plate 3, and a housing 5. The lens 1 is fixed to the transition plate 3. A sound-absorbing component is provided on the mating surface between the transition plate 3 and the housing 5, or vice versa. After the transition plate 3 and the housing 5 are connected, the sound-absorbing component is sandwiched between them. By providing a sound-absorbing component on the mating surface between the transition plate 3 and the housing 5, and sandwiching it during assembly, the component eliminates gaps, blocks vibration transmission paths, and absorbs fit errors caused by assembly tolerances, effectively reducing high-frequency impact noise by more than 80% (verified by NVH testing). This design does not require changes to the original snap-fit ​​structure and is compatible with existing production processes.

[0019] Please see Figures 1 to 2 Preferably, the noise-absorbing element is an elastic element. The elastic element can deform elastically to eliminate the gap between the housing 5 and the transition plate 3, and prevent relative movement between the two.

[0020] Please see Figures 1 to 2 Preferably, the elastic element is a silicone ring 4, which is disposed on the end face of the housing 5 that mates with the transition plate 3. The silicone ring 4 is disposed on the end face of the housing 5 to facilitate the compression and deformation of the housing 5 and the transition plate 3, allowing the buckle to engage. To allow the buckle to deform and engage in the latch, the buckle usually has a allowance for deformation. After engagement, this allowance becomes a gap for the collision between the two. The presence of the silicone ring 4 allows it to push the transition plate 3 in the opposite direction after engagement, thereby causing the buckle to press against the surface of the latch, eliminating the gap generated after engagement, and thus eliminating any abnormal noise caused by collision. The elastic element can also be a rubber ring, and is not limited to this. The housing 5 is made of hard plastic material.

[0021] Please see Figures 1 to 2 Preferably, the silicone ring 4 and the housing 5 are integrally injection molded in two colors. The integral injection molding of the silicone ring 4 and the housing 5 increases the bonding strength by 300% (peel force > 50 N / cm) and reduces separate assembly steps (saving 15 seconds per piece).

[0022] Please see Figures 1 to 2 Preferably, the silicone ring 4 protrudes from the end face of the housing 5, and the protrusion direction is opposite to the fastening direction of the transition plate 3 and the housing 5. The reverse protrusion design of the silicone ring 4 facilitates the housing 5 and the transition plate 3 to squeeze the silicone ring 4, thereby eliminating gaps.

[0023] Please see Figures 1 to 2 Preferably, the inner circumferential dimension of the silicone ring 4 is smaller than the dimension of the transition plate 3 when it is fastened into the inner circumferential surface of the housing 5. The smaller inner circumferential dimension of the silicone ring 4 facilitates the insertion of the transition plate 3 and provides initial preload to the housing 5 and the transition plate 3.

[0024] Please see Figures 1 to 2 Preferably, the inner circumferential surface of the silicone ring 4 gradually decreases in size from the end furthest from the housing 5 to the end closest to the housing 5. The conical design of the inner circumference of the silicone ring 4, with a taper angle of 3°-5°, enables self-centering and also prevents the transition plate 3 from wobbling relative to the housing 5, further achieving noise reduction.

[0025] Please see Figures 1 to 2 Preferably, the housing 5 and the transition plate 3 are either interference-fitted or transition-fitted. The interference / transition fit facilitates the fixed connection between the housing 5 and the transition plate 3.

[0026] Please see Figures 1 to 2 Preferably, a film 2 is provided on the surface of the transition plate 3 facing away from the housing 5, and the lens 1 is bonded to the film 2. The lens 1 and the transition plate 3 are connected with glue, which also avoids abnormal noise. The housing 5 is equipped with components such as a base, spring coil, bracket, light guide block, and PCB.

[0027] The working principle of this utility model is as follows:

[0028] The silicone ring 4 and the housing 5 are combined into a single unit using two-color injection molding. The lens 1 is bonded to the transition plate 3 using 3M film 2. The assembled transition plate 3 assembly, including the lens 1, is then snapped into the housing 5. Since the silicone ring 4 on the housing 5 acts as a shock absorber and mitigates tolerances, the mating surfaces of the housing 5 and the transition plate 3 can be interference-fitted. This way, if the transition plate 3 and the housing 5 are too tightly fitted, the transition plate 3 can continue to compress the silicone ring 4 because the silicone ring 4 is soft, thus mitigating the clamping fit and preventing breakage of the clamp due to excessive tightness during subsequent vibration tests or mechanical impacts. If the mating surfaces of the transition plate 3 and the housing 5 are too loose, the interference fit between the silicone ring 4 and the transition plate 3 can neutralize the gap between the transition plate 3 and the housing 5, preventing abnormal noise caused by looseness and thus resolving any potential abnormal noise issues. A silicone ring 4 is installed around the entire circumference of the mating surface between the housing 5 and the transition plate 3. This changes the hard contact between the mating surface of the transition plate 3 and the housing 5 to a soft contact during assembly, preventing possible abnormal noises caused by extreme vibrations. In addition, the silicone ring 4 around the entire circumference of the housing 5 can be set with different colors according to different customer preferences, which also improves the appearance of the rearview mirror.

[0029] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0030] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0031] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0032] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A reduced noise interior mirror comprising a mirror piece, a transition plate, and a housing, the mirror piece being fixed to the transition plate, characterized in that: The transition plate and the shell are provided with sound-absorbing members on the mating surfaces thereof, or the shell and the transition plate are provided with sound-absorbing members on the mating surfaces thereof; the sound-absorbing members are clamped between the transition plate and the shell after the connection of the transition plate and the shell.

2. The anti-noise inside mirror according to claim 1, characterized in that: The sound-absorbing member is an elastic member.

3. The anti-noise inside mirror according to claim 2, characterized in that: The elastic member is a silica gel ring, which is arranged on the end surface of the shell and the transition plate.

4. The anti-draft mirror according to claim 3, wherein: The silica gel ring and the shell are integrally formed by two-color injection molding.

5. The anti-moaning inside rearview mirror of claim 3, wherein: The silica gel ring protrudes from the end surface of the shell, and the protruding direction is opposite to the buckling direction of the transition plate and the shell.

6. The anti-draft mirror according to claim 5, wherein: The inner circumferential surface of the silica gel ring is smaller than the circumferential surface of the transition plate buckled into the shell.

7. The anti-mozzle mirror according to claim 6, wherein: The inner circumferential surface of the silica gel ring gradually decreases in size from the end far away from the shell to the end close to the shell.

8. The anti-draft mirror according to claim 5, wherein: The shell and the transition plate are in interference fit or transition fit.

9. The anti-moaning inside rearview mirror of claim 1, wherein: The end surface of the transition plate away from the shell is provided with a film, and the film is adhered to the lens.

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