JPH04132830U - Mounting structure of operation dial in automobile seat - Google Patents

Abstract

(57) [Summary] [Purpose] The drive shaft of the drive device and the boss of the operation dial are spline-coupled, and a snap spring is provided in the cut groove provided on the drive shaft through the slit provided in the boss to operate the drive shaft. The object of the present invention is to prevent backlash occurring in an operation dial in an automobile seat having a dial attached thereto. [Structure] The operation dial (1) has a rigid body (11) and an elastic coating that covers the outer surface of the body (11) and has a fitting part (10c) on an extension of the boss (1a) of the body (11). The elastic covering (10) has a convex part (10a) in the fitting part (10c) for preventing play in the circumferential direction of the operation dial (1), and a play in the axial direction. The invention is characterized in that it is provided with a protrusion (10b) that prevents this.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is suitable for use in automobile seats, such as lumbar support devices and height adjustment. This invention relates to an operation dial mounting structure for a drive device such as a motor.

0002

[Conventional technology]

Car seats have operation dials on the seat back (SB), etc., as shown in Figure 3. There are some that have (1). The operation dial (1) shown in Figure 3 is for lumbar support. It is for equipment. This type of operation dial (1) is used for the lumbar support device as shown in Figures 4 and 5. It is spline-coupled to the drive shaft (2) of a drive device such as a ) to prevent removal.

0003 That is, the boss (1a) of the operation dial (1) has a A concave groove for spline fitting and a slit (1) for engaging the snap spring (3). b) (1b) is provided, while a spline (2b) and a kerf are provided at the tip of the drive shaft (2). (2a) is provided. Therefore, the spline (2b) of the drive shaft (2) is connected to the boss ( 1a), insert the snap spring (3) into the slit (1a) of the boss (1a). b) By attaching (1b) to the groove (2a) of the drive shaft (2), the drive shaft ( The operation dial (1) is attached to 2).

0004

[Problem that the idea aims to solve]

Figure 6 shows the engagement points of the snap spring (3) on the drive shaft (2) and the operation dial (1). The kerf (2a) of the drive shaft (2) and the slit (1b) of the boss (1a) have (L ₁ ) (L ₂ ) has a gap. Therefore, play of the snap spring (3) occurs within the kerf (2a) and the slit (1b), and the operation dial (1) moves in the axial direction of the drive shaft (2), causing play. Further, play occurs in the engagement between the spline (2b) provided at the tip of the drive shaft (2) and the groove in the boss (1a), and play occurs in the rotating direction of the operation dial. Therefore, there was a problem in that this backlash became a source of abnormal noise. Therefore, the present invention aims to prevent the occurrence of such abnormal noise.

[0005]

[Means to solve the problem]

In order to achieve the above objectives, the present invention has the operation dial connected to the boss and the slit. a rigid body having a rigid body, and a rigid body covering the outer surface of the body, and a rigid body having a shape of the drive shaft on an extension of the boss. an elastic covering having a fitting portion into which the spline shaft fits; is integrated into the fitting part of the spline shaft and comes into elastic contact with the outer circumferential surface of the spline shaft to prevent play in the circumferential direction. a protrusion that elastically contacts the tip surface of the spline shaft to prevent play in the axial direction; It is made up of the following.

[0006]

[Effect]

The operation dial is biased in the axial direction of the drive shaft by the protrusion of the elastic covering, and The snap spring is biased in the circumferential direction by the convex part of the elastic covering. Connect to one end of the slit and the other end of the kerf, and attach the snap to the slit and kerf. There is no play in the push spring, and at the same time, the spring between the drive shaft and the boss of the operation dial is There is no play in line connections either.

[0007]

【Example】

Hereinafter, embodiments of the present invention will be described based on FIGS. 1 and 2. The operation dial shown in (1) in the figure is made of rigid synthetic material such as polypropylene. A main body (11) made of fat and an elastic covering made of an elastic member provided integrally on this main body (11) It is composed of a body (10). The above main body (11) is integrally provided with a cylindrical boss (1a), and this boss ( A slit (1b) is provided in 1a). The elastic covering (10) is made of elastomer such as synthetic rubber and covers the outer surface of the main body (11). During this molding, the extension of the through hole of the boss (1a) of the main body (11) is A fitting portion (10c) having an inner diameter approximately the same as that of the boss (1a) is formed on the longitudinal side. So In this fitting body (10c), there is a protrusion (10a) ( 10a) and protrusions (10b) (10b) that prevent axial play are formed on the elastic covering. (10) is integrally molded. The drive shaft shown in (2) in the figure is the same as the conventional product, and has the boss (1) at the tip. The spline shaft (2b) that meshes with a) and the snap spring (3) engage with each other. A kerf (2a) is provided.

[0008] Therefore, from the state shown in Fig. 1, the spline shaft (2b) of the drive shaft (2) should be operated. Splined to the boss (1a) provided on the main body (11) of the handle (1), Insert the snap spring (3) into the fitting part (10c) of the elastic covering (10). into the groove (2a) of the drive shaft (2) through the slit (1b) of the boss (1a). Then, as shown in Fig. 2, a convex portion is formed on the outer peripheral surface of the spline shaft (2b) of the drive shaft (2). (10a) (10a) and the protrusions (10b) (10b) are in elastic contact with the tip surface. Therefore, the operation dial is controlled by the protrusions (10b) (10b) of the elastic covering (10). (1) is urged outward from the tip of the drive shaft (2). Therefore, the snap spring The ring (3) is located on the operation dial side of the kerf (2a) of the drive shaft (2), and They are respectively joined to the opposite inner surface of the slit (1b). Therefore, the snap spring There is no play in the shaft (3) in the axial direction of the drive shaft (2). Further, a fitting portion (10c) of the elastic covering (10) is provided on the outer peripheral surface of the spline shaft (2b). ) in elastic contact with the convex portions (10a) (10a), the splices of the drive shaft (2) The engagement between the shaft (2b) and the boss (1a) of the operating handle (1) is ensured, and the drive No play occurs in the rotational direction of the operation dial (1), which is the circumferential direction of the shaft (2).

[0009]

[Effect of the idea]

According to the present invention, the spline shaft of the drive shaft attached to the operation dial is elastically coated. The convex portions and protrusions of the cover come into elastic contact. Therefore, the operation dial is biased in the axial direction and The drive shaft and operation dial boss are integrated to prevent the operation dial from being pulled out. The second snap spring has no play in the axial direction of the drive shaft, and also There is no play in the spline connection with the operation dial. Therefore, the operation dial is Because there is no wobbling in the axial and circumferential directions of the drive shaft, the operating die on the drive shaft It is possible to prevent the generation of abnormal noise from the installation location of the barrel. In addition, the elastic member is made of the same material as the elastic covering that forms the outer surface of the operation dial. This makes the molding easier and the operation dial is an elastic member. Therefore, it has cushioning properties and can improve safety.

[Brief explanation of drawings]

FIG. 1 is an exploded partial cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a partial sectional view of the attached state shown in FIG. 1;

FIG. 3 is a perspective view of an automobile seat having an operation dial.

FIG. 4 is an exploded perspective view of a conventional operation dial.

FIG. 5 is a cross-sectional view showing how a conventional operation dial is attached.

FIG. 6 is a partially enlarged sectional view of a conventional operation dial mounting location.

[Explanation of symbols]

1 Operation dial 2 Drive shaft 3 Snap spring 10 Elastic covering 11 Rigid body 10a Convex part to prevent play in circumferential direction 10b Protrusion to prevent axial play

Claims (1)

[Scope of utility model registration request] Claim 1: A drive shaft of a drive device and a boss of an operation dial are spline-coupled, and a snap spring is provided in a cut groove provided on the drive shaft through a slit provided in the boss to attach the operation dial to the drive shaft. In the automobile seat, the operation dial includes a rigid body having the boss and a slit, and an elastic body having a fitting portion that covers the outer surface of the body and into which the spline shaft of the drive shaft fits on an extension of the boss. The fitting portion of the elastic covering includes a convex portion that comes into elastic contact with the outer circumferential surface of the spline shaft to prevent play in the circumferential direction, and a convex portion that comes into elastic contact with the distal end surface of the spline shaft in the axial direction. A mounting structure for an operation dial in an automobile seat, which includes a protrusion that prevents rattling and is integrated with an elastic covering.