CN1054578C

CN1054578C - Horn switch for steering wheel

Info

Publication number: CN1054578C
Application number: CN95115970A
Authority: CN
Inventors: 矶村基; 藤田佳幸; 内田贞夫
Original assignee: Toyoda Gosei Co Ltd
Current assignee: Toyoda Gosei Co Ltd
Priority date: 1994-10-24
Filing date: 1995-10-24
Publication date: 2000-07-19
Anticipated expiration: 2015-10-24
Also published as: JPH08119116A; JP3005934B2; CN1125184A

Abstract

To provide a steering wheel horn switch not requiring a separate cushion piece, regarding the horn switch structure where the flange section of a guide spacer collides with the contact plate of sheet metal clue to a spring reaction force at the return process of a horn pad after operation. This horn switch has the mechanism where a horn pad 11 is pressed against a spring force, and a moving contact 13 interlocked therewith consequently contacts a stationary contact 15 for keeping electrical continuity. The stationary contact 15 is formed out of a sheet metal contact plate 17, and fitted with a guide spacer 23A for insertion in a spacer shaft insertion hole 19 drilled through the plate 17 and subsequent engagement with a flange section 21, thereby adjusting contact stroke. Furthermore, a projection 39 or a recess is formed on the flange section 21 of the spacer 23A for contact with the plate 17.

Description

Horn switch for steering wheel

The present invention relates to horn switch for steering wheel, say in further detail, relate to horn switch with following structure: be installed in the control wheel of automobile, with the movable connection of this loudspeaker mat interlock by pushing the loudspeaker mat be configured in the loudspeaker mat below fixed contact contact, become conducting state.

About the horn switch of the above-mentioned type, has for example structure shown in Fig. 1～3.

Basic structure is: push loudspeaker mat 11 with the travelling contact 13 of this loudspeaker mat 11 interlocks by antagonistic spring elastic force the time and contact with the fixed contact 15 that is configured in loudspeaker mat 11 belows, become conducting state.And fixed contact 15 is located on the metal contact blocks 17, and guiding spacer 23 also is installed, and constitutes contact length, and above-mentioned guiding spacer 23 inserts in the spacer shaft insertion hole 19 that forms on this contact panel 17, is blocked by flange part 21.

Specifically, its formation is: bear spring force by a pair of leaf spring of falling the

chevron

27,27 above the both sides of the contact panel 17 that is installed in central opening by insulating element 25.And travelling contact 13 is arranged on the two ends downside of the above-mentioned leaf spring of falling the

chevron

27,27, and the formed rib 31 of pushing contacts with the two ends upper surface of the leaf spring of falling the

chevron

27,27 on the inserts 29 of loudspeaker mat 11, can carry out pressing operation to travelling contact 13.

In addition, guiding spacer 23 by spacer shaft insertion hole 19, makes the lug boss 28 that forms on the inserts 29 of preceding end in contact loudspeaker mat 11 of spacer axle 24 from downside, in this state, from the downside of spacer 23 screw 30 is screwed into lug boss 28, fixes.In legend, the 33rd, with the anchor fitting of contact panel 17 positioning and fixing at the spoke position of control wheel etc.

Here, loudspeaker mat 11 pushed (operation) after, when the loudspeaker mat returned, because the antagonistic force of spring, the flange part of guiding spacer hit metal contact blocks, produces noise problem.

Therefore, the flange part 21 of former spacer 23 with contact plate 17 contacted sides, buffer unit 35 (thereby production part quantity increases and the problem that increases of installation work-hour number is unsatisfactory thereupon) must be installed in addition.

In view of the above problems, the purpose of this invention is to provide a kind of horn switch for steering wheel, make when returning after the loudspeaker mat is carried out pressing operation, the lug boss of the spacer that leads hits in the formation of metallic contact plate because of spring reaction power, does not need to install in addition slow middle parts.

(1) horn switch for steering wheel of claim 1 of the present invention solves above-mentioned problem with following structure.

The structure of horn switch is: be installed in the control wheel of automobile by pushing the loudspeaker mat and make with the travelling contact of this loudspeaker mat interlock and contact with fixed contact below being configured in the loudspeaker mat, become conducting state; One of travelling contact or fixed contact are located on the metal contact blocks, and the guiding spacer is installed, and constitute contact length, and this guiding spacer inserts in the spacer shaft insertion hole that forms on the metal contact blocks, is blocked by flange part; The horn switch of said structure is characterised in that flange part formation protuberance or recess at spacer make it partly contact with contact panel.

(2) horn switch for steering wheel of claim 2 of the present invention solves above-mentioned problem with following structure.

The structure of horn switch is: be installed in the control wheel of automobile, by pushing the loudspeaker mat travelling contact that links with this loudspeaker mat contacted with the fixed contact that is configured in loudspeaker mat below, become conducting state; One of travelling contact or fixed contact are located on the metal contact blocks, and the guiding spacer is installed, and constitute contact length, and this guiding spacer inserts in the spacer shaft insertion hole that forms on the metallic contact plate, is blocked by flange part; The horn switch of said structure is characterised in that the flange part of spacer is forming the fin that absorbs impact usefulness with the contacted side of contact plate.

The simple declaration of figure

Fig. 1 is the backplan (omitting loudspeaker flange part back side spoke) of the loudspeaker mat of interior dress horn switch for steering wheel of the present invention.

Fig. 2 is the section-drawing of example in the past at Figure 1A-A line position.

Fig. 3 is the section-drawing at Figure 1B-B line position.

Fig. 4 is the section-drawing of the embodiment of the invention at Figure 1A-A line position.

Fig. 5 is the shaft side projection drawing that is illustrated in an example of the spacer that uses in the horn switch for steering wheel of the present invention.

Fig. 6 represents another routine shaft side projection drawing of spacer equally.

Fig. 7 represents another routine shaft side projection drawing of spacer equally.

Fig. 8 represents another routine shaft side projection drawing of spacer equally.

In representing, Fig. 9 adorns the section-drawing of loudspeaker mat of the horn switch for steering wheel of other example of the present invention.

The explanation of symbol among the figure

11,11A loudspeaker mat;

13,13A travelling contact;

15,15A fixed contact;

17,17A contact panel;

19 spacer shaft insertion holes;

The flange part of 21 spacers;

23,23A, 23B, 23C, the 23D spacer that leads;

25 spacer axles

39,39A is at the protuberance of flange part formation;

40 recesses in flange part formation;

41 absorb the impact fin;

43 guiding spacers;

45 spacer upper end flange portions.

Followingly explain the present invention according to embodiment.The part identical with above-mentioned example, with same symbolic representation, the explanation of all or part of these parts of omission simultaneously.

(1) present embodiment has and in the past identical following basic comprising.(with reference to Fig. 3)

Basic comprising is: push loudspeaker mat 11 by the elastic force of antagonistic spring, contact with the fixed contact 15 that is configured in loudspeaker mat 11 belows with the travelling contact 13 of this loudspeaker mat 11 interlocks thus and become conducting state; And fixed contact 15 is located on the metallic contact plate 17, guiding spacer 23A also is installed to limit contact length, and this guiding spacer 23A inserts in the spacer shaft insertion hole 19 that forms on the contact panel 17, is blocked by flange part 21.

(2) in above-mentioned basic comprising, the 1st kind of pattern of present embodiment forms protuberance 39, as shown in Figure 5 to contact with contact panel 17 parts on the flange part 21 of spacer 23A.The shape of protuberance is not limited to several to projection 39 along radial direction elongation as shown in Figure 5, also can form several pin shape parts 139A as shown in Figure 6; Even spacer 23B also can be further to form arbitrary shapes such as spiral fashion protuberance.In addition, as shown in Figure 7, also can form recess (hole portion) 40 on the flange part 21A of spacer 23C, this recess shapes also can be arbitrary shapes such as recess shape recess, spiral fashion recess.

(3) the 2nd of present embodiment the kind of pattern as shown in Figure 8, the flange part 21 of spacer 23D form to absorb impacts the fin 41 of usefulness in the side that contacts with contact panel.Usually, with Mould Machining spacer 23 time, make simultaneously flash along deciding direction promptly vertically partially outside direction extend into shape, can form this fin 41 simply.

(4) running condition to the various embodiments described above describes.

The same with the past, by spacer 23A (23B, 23C or 23D) loudspeaker mat 11 is installed on the contact panel 17.And the same with the past when pushing loudspeaker mat 11 and operating, when the loudspeaker mat returned, because the antagonistic force of spring, the lug boss 21 (21A) of guiding spacer 23A hit metal contact blocks 17.But at this moment, (23A～23C), owing to formed projection 39 (39A) or the recess 40 that flange part 21 is contacted with contact panel 17 parts, so the sound that sends when hitting diminished when spacer was above-mentioned the 1st kind of pattern.In addition, when spacer is above-mentioned the 2nd kind of pattern (23D), absorbs to impact and play and the same effect of buffer unit in the past, do not send the strike sound with fin.

(5) in addition, be that to support the loudspeaker mats with the leaf spring of falling the chevron 27 be that example describes above, but the present invention also go for structure as shown in Figure 9.

That is, its structure is: the contact plate 17A that the top projected rib 31A that upward forms with loudspeaker mat 11A contacts applies application force upward by the coil spring 47 between flange part 45 that is contained in spacer 43 and the spacer 43.In this constituted, the downside of flange part 45 can be a structure same as the previously described embodiments, for example forms protuberance 39.13A is a travelling contact, and 15A is fixed contact (bearing contact), and 30A is a mounting screw, the 49th, and contact panel.

The effect and the effect of invention are as follows:

(1) horn switch for steering wheel of claim 1 of the present invention, as mentioned above, because on the flange part of spacer, form protuberance or recess, it is partly contacted with contact panel, therefore when the loudspeaker mat returns, when even the flange part 21 of guiding spacer 23 hits metallic contact plate 17 because of action of the spring,, can conclude that the strike change of tune is little because area of contact is little.By the way, to the spacer of Fig. 5 and with the spacer that the lug boss gap is filled up fully hit signal to noise ratio than the time, with logarithm ratio, the former strike sound level is the latter's 1/3.

(2) horn switch for steering wheel of claim 2 of the present invention, as mentioned above, because forming in the side that contacts with contact plate, the flange part of spacer absorbs the fin that impacts, when therefore the loudspeaker mat returns, even the effect of spring is arranged, the flange part 21 of guiding spacer 23 hits metallic contact plate 17, owing to absorb the existence of the fin 41 that impacts, absorb the fin 41 that impacts and play and the same effect of buffer unit in the past, and do not send the strike sound.

(3) therefore, any horn switch for steering wheel of above-mentioned the 1st～2 pattern is when returning behind operation loudspeaker mat, because of spring reaction power, exist the flange part of guiding spacer to hit in the structure of metallic contact plate, can play the effect that does not need to adorn in addition buffer unit.

Claims

1. horn switch for steering wheel, it has following structure: be installed in the control wheel of automobile and make with the travelling contact of this loudspeaker mat interlock and contact the formation conducting state with the fixed contact that is configured in loudspeaker mat below by pushing the loudspeaker mat; One of above-mentioned travelling contact or fixed contact are located on the metal contact blocks, and the guiding spacer is installed, and limit contact length, and this guiding spacer is inserted in the spacer shaft insertion hole that forms on the contact panel, is blocked by flange part; It is characterized in that, in having the horn switch of said structure, on the flange part of above-mentioned spacer, form protuberance or recess, it is partly contacted with above-mentioned contact panel.

2. a horn switch for steering wheel as claimed in claim 1 is characterized in that described protuberance is the fin that is used to absorb impact.