JPH0524603Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mechanism for holding the mirror of an automobile rearview mirror in a housing, and is an improved mechanism for maintaining the mirror holding frame in a stable state.

BACKGROUND OF THE INVENTION Many methods are already known for attaching a rearview mirror to a housing for an automobile. Particularly in recent years, mirror housings have been made of synthetic resin to enhance the design effect of the exterior, as well as to make them lighter and more rigid. Therefore, in an attempt to rationally attach the mirror to the housing, the mirror was supported along the inner edge of the housing, and the outer edge of the mirror was held between a frame-shaped rim body. What it does is known. Such devices are disclosed, for example, in U.S. Pat.

Problem to be solved: Regarding the mirror housing described above,
A rim body (mirror holding frame) for holding the outer edge of the mirror and fixing it to the housing has a locking recess on the mirror housing side as a means for engaging and fixing the mirror to the housing. A locking pawl that engages with the locking recess to perform the locking function is provided on the side, and when the locking pawl engages with the locking recess during assembly, both can hold and fix the mirror. Both are molded from synthetic resin.

Therefore, although the intended purpose can be achieved at first glance, since the entire wall is formed to have a uniform thickness, flexibility becomes a problem and the function of the locking part cannot be fully demonstrated. First, the locking force decreases as the material changes over time, and the elastic force weakens, causing the presser frame to come off at the locking portion when subjected to strong vibrations. Therefore, this is inconvenient as it becomes a cause of damage to the mirror. However, if you try to increase the locking force of the locking pawl against the locking recess at the locking part and increase the degree of engagement between the two, the wall thickness will inevitably increase locally, causing damage to the surface of the molded product. Sink marks occur on the surface and cause problems. Alternatively, when removing the presser frame due to damage to the mirror, the locking force becomes large and the elastic force does not work effectively, making removal difficult.
Problems such as this arise.

For this reason, there is a need for a device that is stable after assembly, allows for easy work such as mirror replacement, and has a structurally reasonable structure.

Means for Solving the Problems: An object of the present invention is to solve the above-mentioned problems and provide an effective mirror holding mechanism.

That is, in the present invention, a plurality of locking pieces protruding from the back side of the mirror holding frame are engaged with locking recesses provided at the inner peripheral edge of the mirror housing.
In an automobile rear endoscope in which the mirror is clamped and fixed between the inner circumference of the mirror housing and the mirror holding frame, the locking piece of the mirror holding frame has a receiving plate portion of an appropriate width on the side of the main body of the locking piece. A holding rib is provided on the side of the locking recess of the mirror housing at an appropriate distance apart from the holding plate portion of the locking piece during assembly.

Function: According to the mirror holding mechanism of the present invention, when assembling the mirror, in order to engage the locking piece protruding on the back side of the mirror holding frame with the locking recess on the inner peripheral edge of the mirror housing, Due to the elasticity of the material, the end locking pawl of the locking piece engages with the locking surface of the locking recess and is locked, thereby engaging the receiving part provided on the inner peripheral edge of the housing side. The mirror is clamped and fixed by the mirror holding edge of the mirror holding frame.

In this state, the receiving plate part of the locking piece attached to the mirror holding frame that is protruding from the side of the main body engages with the holding rib that is slightly away from the locking recess of the mirror housing and protrudes from the side thereof. Even if the locking claw on the mirror holding frame side tries to come off from the locking recess on the housing side due to external force, the locking piece will be displaced to the rear side due to the contact between the receiving plate and the holding rib. By preventing this, the mirror holding frame can be held at all times so that it does not come loose and does not come undone.

Embodiment: Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a partially cutaway perspective view of a specific example of an automobile rear endoscope equipped with the mirror holding mechanism of the present invention, in which 1 is a mirror housing, 2 is a mirror, and 3 is a mirror holding frame. The mirror 2 is provided inside the mirror housing 1 as shown in the figure.
The mirror is supported on the upper surface of a plurality of mirror support ribs 11 which are formed in a block shape and protrude at appropriate intervals. A protrusion 12 protruding toward the opening direction near the inner circumferential edge of the housing of the mirror supporting rib 11 serves to receive the circumferential edge of the mirror 2. A step 13 provided on the inner peripheral edge of the mirror housing 1 serves as an engagement portion into which the mirror holding frame 3 is fitted. A plurality of locking recesses 15 provided at required intervals at a position below this step 13 form a locking surface 16 on the opening side of the housing 1, as shown in FIG. be.

As shown in FIGS. 2 and 3, on both sides of each of the locking recesses 15, presser ribs 17 are provided protruding from the inner surface of the housing 1 at positions slightly apart from the ends of the locking recesses 15. be. The upper half of the presser rib 17 is provided with a slight gap 18 from the inner surface of the housing 1 so that it can be bent in the rib forming direction.

As shown in FIGS. 1 and 2, the mirror holding frame 3 has a fitting portion 31 around the entire circumference that engages with the step 13 of the mirror housing 1, and corresponds to the locking recess 15. A plurality of locking pieces 32 are provided so as to protrude from the back side at the position where the locking member 32 is opened. Each of these locking pieces 3
2, a locking claw 33 is provided outward at the lower end, and the base portion 32' is made relatively thin to have flexibility;
In addition, thin receiving plates 34 are provided on both sides of the main body 32'.
is installed in an integrated manner. This receiving plate 34
is fitted into a gap 18 formed between the presser rib 17 on the housing 1 side and the housing 1 during assembly.

The relationship between the upper surface of the locking pawl 33 and the locking surface 16 of the locking recess 15 is determined by the upper surface of the mirror support rib 11 of the mirror housing 1 and the back side pressing surface 35 of the mirror holding frame 3. When the peripheral edges of 2 are held together, they are engaged.

In the present invention configured as described above, when assembling the mirror 2 to the mirror housing 1, the locking recess 15 provided in the mirror housing 1 is
By engaging the end locking claw 33 of the locking piece 32 attached to the mirror holding frame 3, the mirror 2 is attached to the upper surface of the mirror support rib 11 on the mirror housing 1 side and the mirror holding frame 3.
It is clamped and fixed by the pressing surface 35 of. On this occasion,
When the locking pawl 33 engages with the locking surface 16 of the locking recess 15 and the presser frame 3 is fixed via the locking piece 32, both sides of the main body 32' of the locking piece 32 Since the receiving plate 34 provided at
As a result, the locking pawl 33 of the locking piece 32 is held in a locked state. Therefore, unless an external force is actively applied to the presser frame 3 to push the presser ribs 17 inwardly through the locking pieces 32, the presser ribs 17 will not lock through the receiving plate 34. The piece 32 is held in a steady position, and the engagement between the locking surface 16 of the locking recess 15 and the locking pawl 33 is not disengaged and is held in a stable state.

If it becomes necessary to replace mirror 2,
Attach each locking piece 32 of the mirror holding frame 3 to the mirror 2.
By pushing toward the center of the locking piece 32, the presser rib 17 is pushed and displaced in the backward direction as shown by the two-dot chain line in FIG. Since the lock with the surface 16 is released, the holding frame 3 can be removed by lifting up in sequence and the mirror can be replaced.

Further, as described above, by configuring the mechanism of the locking piece holding portion of the mirror housing, the molding process can be performed without any difficulty.

Effects of the invention: According to the invention, the mirror can be securely fixed with a simple configuration without any mechanical complexity.
Even if subjected to external forces such as vibrations, the locking part of the mirror holding frame will not loosen, lift up, or come off, and of course, when molding the mirror housing, there will be no local thick parts. Since it can be formed into a shape, it does not affect the finish of the product.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a specific example of an automobile rear endoscope equipped with the mirror holding mechanism of the present invention, Fig. 2 is an enlarged vertical sectional view of the main parts of the mirror holding mechanism, and Fig. 3 is the same as Fig. 2. FIG. 1...Mirror housing, 2...Mirror, 3...
...Mirror holding frame, 11...Mirror support rib, 12
...Protrusion, 13...Step, 15...Locking recess, 1
6...Latching surface, 17...Presser rib, 18...〓
Between, 31... Fitting portion, 32... Locking piece, 3
2'... Base portion, 33... Locking claw, 34... Receiving plate, 35... Pressing surface.

Claims (1)

[Claim for Utility Model Registration] The mirror can be inserted into the mirror housing by engaging a plurality of locking pieces protruding from the back side of the mirror holding frame with locking recesses provided at the inner peripheral edge of the mirror housing. In an automobile rear endoscope that is clamped and fixed between the peripheral portion and the mirror holding frame, the locking piece of the mirror holding frame is provided with a receiving plate portion of an appropriate width extending from the side of the locking piece main body. and a presser rib is provided on the side of the locking recess of the mirror housing at a distance of an appropriate dimension so that the receiving plate portion of the locking piece is received during assembly. Mirror holding mechanism for mirror.