JPH0515611Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a resin molded body having a rotating part used in a heater device or a ventilation device of an automobile or the like.

[Prior Art] Conventionally, a heater control for an automobile is such that a metal lever for controlling the heater is attached to a housing made of resin, for example, with a support shaft provided in the housing as a fulcrum. By moving the knob on one end of this lever to the left or right, the wire connected to the other end of the lever is driven to control the temperature of the heater device or drive the damper of the ventilation device. It was hot.

However, as mentioned above, in order to mount the metal lever so that it can rotate around the support shaft provided in the housing, a member to prevent the lever from coming off is required at the top of the lever, and the work of assembling the member is difficult. There were problems in that it became complicated and the number of parts increased.

As a rotating part mounting structure with such a retaining mechanism, Japanese Utility Model Application Publication No. 54-22673 discloses a rotating part having a locking part of a bearing part and an elastic claw protruding from the bearing surface of the bearing part, and The shaft is inserted into the shaft and has a groove around the circumference against which the elastic claw is abutted. There is a disclosure of a rotating part mounting structure that is rotatably mounted while preventing movement of the rotating part. Also, Utsukai 48-6471
The shaft has a shaft with a vertical groove and a locking head that protrudes toward the outer circumference at the top, and a rotating part that is pivotally supported by the shaft and is locked to the shaft by the locking head. However, there is a disclosure of a rotating part mounting structure rotatably attached to a shaft part. These rotating part mounting structures can exhibit the effect of preventing the rotating part from coming off when the axial force applied to the rotating part is small. However, these mounting structures cannot restrict rotation. Also, it may deform in the radial direction and may not be able to prevent it from coming off. In the case of a rotating part such as a control lever, which is subjected to a large force in the axial direction, it is not possible to sufficiently prevent it from coming off in view of the above points.

[Problems to be solved by the invention] The invention makes it possible to assemble a resin molded body having a rotating part to the base without a separate retaining member, thereby improving assembly workability. be. That is, the object of the present invention is to provide a mounting structure for a resin molded body having a rotating part that allows for one-touch mounting positioning and attachment of the rotating part to the base, and prevents the rotating part from easily coming off after installation.

[Means for Solving the Problems] The present invention is a mounting structure for a resin molded body having a base portion having a cylindrical shaft portion and a rotating portion that is inserted into and pivotally supported by the cylindrical shaft portion, and which has the above-mentioned features. The cylindrical shaft part includes a locking head that moves in the axial direction due to pressure when the rotating part is inserted into the shaft hole, and that locks onto the upper peripheral surface of the shaft hole when the pressure is released, and the locking head. and a base integrally connected to each other, the upper end of the rotating part of the resin molded body protrudes toward the center of the shaft hole, and the tip thereof is elastically deformable in the axial direction. , and has a rotating part characterized by having a keyhole-shaped stopper part smaller than the shaft hole that prevents the locking head inserted into the shaft hole from moving in the shaft direction. This is a mounting structure for a resin molded body.

The base is, for example, a housing for a heater control and has at least one shank. The base is molded from a general-purpose thermoplastic resin such as ABS. The cylindrical shaft portion is formed of a support shaft portion and an elastic leg portion having a locking head at the top. The support shaft pivotally supports the rotating part of the resin molded body and has a substantially cylindrical shape with a space in the center to allow movement of the locking head. The elastic legs constitute a part of the substantially cylindrical shape of the support shaft, and are independent with a space between them, and make use of the elasticity of the resin to enable movement of the locking head provided at the top. ing. The locking head allows the position of the locking head to be moved by elastic deformation of the elastic legs when the rotating part of the resin molded body is pivotally supported on the cylindrical shaft. After that, lock this rotating part and prevent it from coming off.

The resin molded body having a rotating part is, for example, a control lever, and the resin molded body has a shaft hole in the center and a stopper part formed above the shaft hole, and has a gear part forming a rack at one end. Equipped with a surface,
The opposite surface of the gear part has a first positioning part used during installation, and the other end has a snap part for locking the wire.

The stopper part is a keyhole-shaped part that is smaller than the shaft hole and is made of a resin disc that is integrally molded with the resin molded body. This prevents movement in the direction, and allows the rotation part to rotate within a predetermined angle range.

The resin molded body is provided with a first positioning part formed in a concave shape and surrounded by substantially quadrilateral ribs at one end of the ribs formed along the side surface.

Further, the base is provided with a second positioning part of a plate-shaped guide part that can be inserted into the first positioning part formed in a concave shape of the resin molded body.

When attaching the resin molded body to the base, positioning is performed by inserting the first positioning part into the second positioning part, and when the resin molded body is pressed downward, the rotating part of the resin molded body can be easily moved. Can be attached to a cylindrical shaft.

[Operations and Effects of the Invention] In the present invention, the stopper part provided in the shaft hole of the rotating part of the resin molded body and the locking head formed in the cylindrical shaft part of the base come into contact, and the resin molded body The resin molded body is held rotatably within a predetermined angle range using the rotating portion as a fulcrum, and the resin molded body is prevented from coming off from the cylindrical shaft portion. Since one end of this stopper part is integrated with the rotating part, excessive rotation can be restricted by the abutting locking head. In addition, once this stopper part is assembled, the locking head comes into contact with the stopper part, restricting radial movement and making it difficult for the rotating part to come off. It can be installed more firmly. Therefore, the effect of preventing slippage is enhanced. Furthermore, it has a mounting structure that can be mounted with one touch by pressing when the concave first positioning part provided on the resin molded body and the plate-like second positioning part provided on the base are fitted, improving the workability of installation. be.
Further, the cylindrical shaft portion of the base and the stopper portion of the resin molded body can be formed integrally during molding, so that the number of parts can be reduced.

[Example] The present invention will be explained below with reference to Examples.

The mounting structure of the resin molded body having the rotating part 2 includes the resin molded body 1 and the base part 10 having the cylindrical shaft part 11.
It is composed of.

FIG. 1 is a perspective view of the resin molded body 1, and FIG. 2 is a partial perspective view of the base 10.

The base portion 10 is a resin molded product having a cylindrical shaft portion 11 into which a rotating portion 2 of a resin molded body is inserted, and in this embodiment is a heater control housing formed by injection molding from ABS resin.

Cylindrical shaft part 11 A cylindrical support shaft part 17 is provided on this base part 10 and has a space part 16 in the center, and when the rotating part 2 of the resin molded body 1 is inserted into the shaft hole 2a, the space part is closed by pressing. A locking head 13 that moves inward of the shaft hole 2a and locks the upper circumferential side of the shaft hole 2a after insertion, and an elastic member that integrally connects the locking head 13 and the base 10 and deforms elastically when pressed. It consists of legs 12. Note that the rotation is caused by the contact between the rear part 13a of the locking head 13, which is formed in connection with the top of the elastic leg part 12, and the key-shaped stopper part 3, which is smaller than the shaft hole of the resin molded body 1. The movable part 2 is held rotatably within a predetermined angular range and is prevented from moving inward, thereby preventing the resin molded body 1 from coming off. Further, the elastic leg portion 12 constitutes a part of the cylindrical shaft portion 11, is formed with a gap in the support shaft portion 17, and utilizes the elasticity of the formed resin to prevent the movement of the locking head 13. It is designed to make it easier.

A first positioning part for attaching the resin molded body 1 is formed on the upper surface of the end of the resin molded body 1 which is pivotally supported on the base 10 in the rotating part 2 . This first positioning portion 4 is surrounded by substantially quadrilateral ribs,
It is formed in a concave shape. The size of this concave shape is such that a second positioning portion 14 of the base portion 10, which will be described later, can be inserted therein.

In this embodiment, the resin molded body 1 is a heater control lever, and has a rotating part 2 in its center that is pivotally supported by the cylindrical shaft part 11 of the base part 10 described above.
Further, a snap pin as a snap portion 6 is integrally formed at one end to lock a wire that controls the temperature of a heater device, drives a damper of a ventilation device, etc. by driving a wire (not shown). On the other hand, a gear portion 5 operated by a rotary control knob is formed on the lower surface of the other end. Further, on the opposite surface of the gear portion 5, the above-mentioned concave first positioning portion 4 surrounded by a substantially quadrilateral rib is formed along the side wall of the end portion. Furthermore, a disk-shaped resin stopper portion 3 is formed in the shaft hole 2a and protrudes toward the center from the upper end side of the shaft hole 2a. This stopper part 3 has a gap 7 between the wall end of the shaft hole 2a and the stopper part 3 so that the tip part can be elastically deformed in the axial direction. A locking head 13 provided on the cylindrical shaft portion 11 is inserted into the cavity 7, and after insertion, the rear surface 13a of the locking head and the side surface of the stopper portion 3 are in contact with each other. The locking head 13 prevents the shaft hole 2a from moving in the axial direction. The stopper part 3 is such that the rotating part 2 can rotate within a predetermined angle range when the locking head 13 is inserted into the cavity 7, and the locking head 13 can move in the axial direction. It has a shape and wall thickness that prevents this. The stopper part 3 is formed of the same resin material as the rotating part 2 by integral molding. FIG. 3 is a plan view of the essential parts of the heater control lever 1 attached to the base 10, and FIG. 4 is a state immediately before the shaft hole 2a of the heater control lever 1 and the cylindrical shaft portion 11 of the base 10 are engaged. FIG. 5 shows a sectional view of the main part in a state where the shaft hole 2a and the cylindrical shaft part 11 are engaged.

In order to assemble the resin molded body 1 to the base 10,
The lower end surface of the shaft hole 2a of the rotating part 2 of the heater control lever 1 is brought into contact with the cylindrical shaft part 11 of the base part 10 (see FIG. 2) to which the rotary control lever knob and the pinion gear 15 are assembled, and the pinion gear 15 is fitted to the gear part 5 of the heater control lever 1.
The heater control lever 1 is disposed at a position where it will mesh with the recessed first positioning portion 4, the recessed first positioning portion 4 is fitted into the plate-shaped second positioning portion 14 of the base portion 10, and the vicinity of the snap portion 6 at the other end of the heater control lever 1 is pressed downward.
As the engaging head 13 moves toward the shaft core, the tip of the stopper portion 3 is elastically deformed upward.
Then, by further moving the heater control lever 1 downward, the locking head 13 locks the upper peripheral surface of the shaft hole 2a, the elastic deformation of the tip of the stopper portion 3 returns to its original state, and the shaft hole 2a of the heater control lever 1 is locked into the cylindrical shaft portion 11 with one touch.
After being locked, the locking head 13 moves through the gap 7 formed between the stopper portion 3 and the shaft hole 2a, allowing it to rotate within a predetermined angle range.
Further, the movement of the locking head 13 in the axial direction of the shaft hole 2a is prevented by the stopper portion 3 coming into contact with the rear portion 13a of the locking head 13 (see FIG. 3).
The attached heater control lever 1 rotates based on the connected rack and pinion mechanism when a rotary control lever knob (not shown) is rotated, driving a wire (not shown) engaged with the pin of the snap portion 6, thereby driving the temperature control of the heater device, the tamper of the ventilation device, etc.

As described above, the heater control lever 1 (resin molded body) having the rotating part 2 of this embodiment can be freely rotated by directly inserting the shaft hole 2a of the rotating part 2 into the cylindrical shaft part 11 of the base 10 with one touch. This prevents the rotating portion 2 from coming off the cylindrical shaft portion without a separate retaining member. Therefore, it has a streamlined mounting structure with a small number of parts and excellent mounting workability.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a resin molded body of an example,
FIG. 2 is a perspective view of the main part of the base of the embodiment, and FIG.
The figure is a plan view of the main parts showing the installation state of the embodiment,
FIG. 4 is a sectional view of the main part showing the state immediately before the shaft hole of the heater control lever of the embodiment and the cylindrical shaft of the base are locked, and FIG. FIG. 3 is a cross-sectional view of a main part showing a state in which the parts are locked. DESCRIPTION OF SYMBOLS 1... Resin molded body, 2a... Shaft hole, 3... Stopper part, 4... First positioning part, 7... Cavity part, 11... Cylindrical shaft part, 12... Elastic leg part, 13
... Locking head, 17 ... Support shaft part, 14 ... Second positioning part.

Claims (1)

[Claims for Utility Model Registration] (1) A mounting structure for a resin molded body having a base portion having a cylindrical shaft portion and a rotating portion inserted into and pivotally supported by the cylindrical shaft portion, which The shaft part has a locking head that moves in the axial direction due to pressure when the rotating part is inserted into the shaft hole, and that locks onto the upper peripheral surface of the shaft hole when the pressure is released; an elastic leg integrally connected to the base, the upper end of the rotating part of the resin molded body protrudes toward the center of the shaft hole, the tip of which is elastically deformable in the axial direction; , a resin molding having a rotating part, characterized in that the locking head inserted into the shaft hole is provided with a keyhole-shaped stopper part that is smaller than the shaft hole and prevents movement of the locking head in the shaft direction. Body mounting structure. (2) Registration of a utility model in which a resin molded body having a rotating part has a first positioning part used during assembly at one end thereof, and a second positioning part corresponding to the first positioning part at the base. A mounting structure for a resin molded body having a rotating portion according to claim 1.