JP3135920U - Hand brake lever knob structure - Google Patents

Abstract

Provided is a knob structure for a hand brake lever which can withstand long-term use by preventing the vicinity of the base of an engaging claw from being pressed by the knob cover and plastically deforming when the knob cover is attached to the knob body.
A knob main body having a pair of engaging claws attached to the tip of a bush rod that is movable with respect to the hand brake main body, and an engaging hole 58 for engaging with the engaging claws are provided. A knob structure of a hand brake having a knob cover 54 covering the knob body 52, wherein the engaging claw 56 is located at a position closer to the shaft core than the contact surface 60 of the knob body 52 with the knob cover 54. 52 is provided so as to protrude outward from the back surface 62 of the contact surface 60.
[Selection] Figure 2

Description

  The present invention relates to a knob structure of a hand brake lever, and more particularly to a knob structure of a hand brake lever having a knob body and a knob cover that covers the knob body.

  In general, the hand brake lever device operates a hand brake operating portion by rotating a hand brake lever body rotatably attached to a ratchet plate fixed to the vehicle body side by a predetermined angle.

  The turning operation of the hand brake lever body can be performed by pushing the operation knob attached to the tip of the push rod provided in the hand brake lever body and moving the push rod.

  As this operation knob, there is one in which a knob body is attached to the tip of a push rod and this knob body is covered with a knob cover (see Patent Document 1).

In this case, the knob main body and the knob cover are integrated with each other by engaging an engaging claw protruding from the knob main body with an engaging hole formed in the knob cover.
JP 2004-322951 A

  In such an operation knob, when the engaging claw is engaged with the engaging hole, the knob cover is slidably contacted with the knob main body and is elastically deformed so as to crush the vicinity of the base of the engaging claw. Therefore, the vicinity of the base of the engaging claw is plastically deformed and whitened, and there is a concern that the strength is insufficient when used for a long time.

  An object of the present invention is to provide a knob structure of a hand brake lever that can withstand long-term use by preventing the vicinity of the base of the engaging claw from being pressed by the knob cover and plastically deforming when the knob cover is attached to the knob body. There is.

  In order to achieve the above object, a knob structure for a hand brake according to the present invention includes a knob body having a pair of engaging claws attached to the tip of a bush rod that is movable with respect to the hand brake body, and the engagement. A knob structure of a hand brake having an engagement hole that engages with a claw and covering the knob body, wherein the engagement claw is more axial than a contact surface of the knob body with the knob cover The knob body is provided so as to protrude outward from the back surface of the knob main body, which is a core side position.

  According to the present invention, by providing an engaging claw that protrudes outward from the contact surface from the back surface of the knob body, which is a position closer to the shaft core side than the contact surface of the knob body with the knob cover. When the knob cover is attached to the knob body, the vicinity of the base of the engaging claw is prevented from being plastically deformed by being pressed by the knob cover, so that it can withstand long-term use.

  In the present invention, the engaging claw has a thick portion on the connection portion side with the knob body, and has a tapered portion that gradually becomes thinner from the thick portion toward the protruding tip. be able to.

  By adopting such a configuration, a thick and durable portion near the base of the engaging claw, and a tapered portion that gradually becomes thinner toward the tip side, so that stress concentration is provided with a bending on the tip side. And can withstand long-term use.

  In the present invention, the engaging claw may have an outer rounded portion outside the connecting portion with the knob body.

  By adopting such a configuration, by providing an outer rounded portion outside the connecting portion of the engaging claw with the knob body, it is possible to prevent stress from concentrating on both sides of the connecting portion with the knob body, It can withstand long-term use.

  In the present invention, the engaging claw has an inner rounded portion inside the connecting portion with the knob body, and the inner rounded portion is formed at a position away from the back surface of the knob body. Can do.

  By adopting such a configuration, by providing an inner rounded portion inside the connecting portion of the engaging claw with the knob body, it is possible to prevent stress from concentrating on the inner side of the connecting portion with the knob body. It can withstand use.

  In addition, since the inner rounded part is formed at a position away from the back of the knob body, stress applied to the inner and outer positions of the engaging claw is prevented from concentrating on the joint position with the knob body, and is used for a long time. Can withstand.

  Embodiments of the present invention will be described below with reference to the drawings.

  1-7 is a figure which shows the operation knob structure of the handbrake lever which concerns on one embodiment of this invention.

  FIG. 1 is an overall side view showing the hand brake lever device according to the present embodiment in a partially broken view. The hand brake lever device 10 includes a ratchet plate 12, a hand brake lever body 14, a ratchet 16, It has a push rod 18, an operation knob 20, and a grip molded product 22 as a grip.

  The ratchet plate 12 is configured such that a base end portion 24 is fixed to a floor of a vehicle body (not shown), and sector-shaped meshing teeth 26 are formed on a distal end side over a predetermined range.

  The hand brake lever main body 14 is plate-shaped and is in a state of spreading toward the base end side, and is attached to the ratchet plate 12 via the lever connecting pin 28 on the base end side. .

  Further, the base end side of the hand brake lever main body 14 is connected to a brake cable or the like (not shown) via a joint member 30, and a hand brake operating portion (not shown) is operated via the brake cable or the like. It has become.

  Further, the hand brake lever main body 14 is provided with a stopper pin 36, and the position of the stopper pin 36 is regulated by abutting against a guide hole 38 formed in the ratchet plate 12.

  The ratchet 16 is rotatably attached to the hand brake lever main body 14 via a ratchet connecting pin 40, and a claw 42 at the tip of the ratchet 16 can be engaged with the meshing teeth 26 of the ratchet plate 12.

  One end of the push rod 18 is coupled to the ratchet 16 via a push rod coupling pin 44 and is movably attached to the hand brake lever main body 14.

  Further, a push rod spring 46 is attached to the push rod 18, and the push rod spring 46 is biased in the meshing direction of the ratchet 16, that is, the distal end direction of the hand brake lever main body 14. Yes.

  The push rod spring 46 is supported by a plate 48 projecting from the hand brake lever main body 14 at the base end side, and is attached to the base end side of the operation knob 20 at the distal end side.

  Further, an anti-vibration rubber 50 is attached to the midway position of the push rod 18 to prevent interference between the push rod 18 and the hand brake lever main body 14.

  The operation knob 20 is attached to the other end of the push rod 18 and protrudes from the tip of the hand brake lever main body 14.

  The operation knob 20 is formed in an angular cross section, specifically, a substantially quadrangular cross section, and includes a knob body 52 and a knob cover 54 as shown in FIGS.

  The knob body 52 is integrally attached to the other end (tip) of the push rod 18 in advance.

  Specifically, the knob main body 52 is made of synthetic resin formed by injection molding, and the tip of the push rod 18 is inserted into the injection mold during injection molding. The knob main body 52 is integrated with the tip of the push rod 18 by injection molding.

  The knob cover 54 covers the outer surface of the knob body 52 and is integrated with the knob body 52.

  Specifically, the knob body 52 is provided with a pair of elastically deformable engaging claws 56, and the knob cover 54 is provided with a pair of engaging holes 58 that can be engaged with the engaging claws 56. And the engagement hole 58 are engaged with each other so that the knob body 52 and the knob cover 54 are integrated with each other.

  The engaging claw 56 is provided so as to protrude outward from the abutment surface 60 from the back surface 62 of the knob body 52, which is a position closer to the axis X than the abutment surface 60 of the knob body 52 with the knob cover 54. It has been.

  As described above, the engaging claw protrudes outward from the abutment surface 60 from the back surface 62 of the knob body 52, which is a position closer to the axis X than the abutment surface 60 of the knob body 52 with the knob cover 54. By providing 56, when the knob cover 54 is attached to the knob body 52, the vicinity of the base of the engaging claw 56 is prevented from being pressed and plastically deformed by the knob cover 54, so that it can withstand long-term use.

  Further, a thick portion 64 is provided on the side of the engaging claw 56 connected to the knob body 54, and a tapered portion 66 that gradually becomes thinner from the thick portion 64 toward the protruding tip is provided. In the vicinity of the base of the nail 56, it is thick and strong, and gradually thins toward the tip side, so that the tip side is bent to prevent stress concentration and can withstand long-term use.

  Further, by providing an outer rounded portion 68 having a predetermined curvature on the outer portion of the connecting portion of the engaging claw 56 with the knob main body 54, stress is prevented from concentrating on the outer portion of the connecting portion with the knob main body 52. It can withstand long-term use.

  Further, by providing an inner rounded portion 70 having a predetermined curvature inside the connecting portion of the engaging claw 56 with the knob main body 52, stress can be prevented from concentrating on the inner side of the connecting portion with the knob main body 52. It should be able to withstand use.

  In this case, the inner rounded portion 70 of the engaging claw 56 is formed at a position away from the back surface 62 of the knob main body 52, and the stress applied to the inner and outer positions of the engaging claw 56 is concentrated at the joining position with the knob main body 52. To prevent long-term use.

  The knob cover 54 is made of a synthetic resin formed by injection molding similarly to the knob main body 52 and is hollow inside, and an insertion port 72 of the knob main body 52 is formed on the rear end side.

  Then, in a state where the hand brake lever main body 14 to which the push rod 18 with the knob main body 52 is attached is covered with the grip molded article 22, the knob cover is exposed to the knob main body 52 exposed from the opening at the tip of the grip molded article 22. 54 is inserted into the grip molded product 22 from the front end side of the grip molded product 22 so as to cover the knob main body 52 from the front end side, so that the rectangular operation knob 20 is attached.

  Further, as shown in FIG. 4, a lead-in hole 74 for wiring is formed on the lower surface near the tip of the handbrake lever body 14, and the lead-in hole 74 is not blocked by the grip molded product 22. Yes.

  Therefore, as shown in FIG. 5, the lower end of the rear end of the knob cover 54 is extended to the position of the drawing hole 74 to integrally form the drawing hole cover portion 76, so that the drawing hole is provided when the knob cover 54 is attached to the knob body 52. 74 is closed with a pull-in hole cover portion 76 to prevent a finger or the like from entering the insertion hole 74 by mistake when the handbrake lever main body 14 is operated.

  The grip molded product 22 includes a grip portion 78 that covers a grip portion of the hand brake lever main body 14 and a cover that spreads in a skirt shape that covers from the grip portion 78 to the vicinity of the lever connecting pin 28 that is the rotation center of the hand brake lever main body 14. It has the state which has the part 80 integrally.

  The cover portion 80 is flat from the grip portion 78 side to the vicinity of the opposite end, and is in a state of spreading in a skirt shape as the handbrake lever body 14 spreads, and the inside is a space. Therefore, when a load is applied to the cover portion 22 from the side, the cover portion 80 is bent and easily deformed.

  Therefore, in order to prevent deformation of the cover portion 80, as shown in FIGS. 6 and 7, a plurality of ribs 82 that abut against the hand brake lever main body 14 are formed to protrude from the inner surface of the cover portion 80.

  The rib 82 also has a role of increasing the rigidity of the cover portion 80 and suppressing deformation during molding of the cover portion 80.

  Further, the plurality of ribs 82 are formed so as to be inclined in the die cutting direction A at the time of injection molding shown in FIG. 1 so that die cutting can be easily performed.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the above-described embodiment, the grip molded product is integrally formed with the grip portion and the cover portion. However, these may be formed as separate members, or may be formed as a grip without the cover portion. is there.

  Moreover, in the said embodiment, although the operation knob was shown as a thing with a cross-sectional substantially square shape, it is not restricted to this example, It is also possible to make it a polygonal shape more than a cross-sectional pentagon shape.

It is a whole side view showing the hand brake lever device concerning this embodiment partially broken. FIG. 2 is an enlarged plan view showing a part of the operation knob of FIG. 1 in cross section. It is a longitudinal cross-sectional view of the operation knob of FIG. It is the elements on larger scale which show the lead-in hole for wiring which looked at the handbrake lever main part from the lower part side. It is a side view which shows the relationship between the drawing-in hole for wiring of FIG. 4, and the drawing-in hole cover part of a knob cover. It is sectional drawing which shows the state of the rib of the cover part in a grip molded product. It is a figure which shows the state of the rib seen from the arrow VII direction of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hand brake lever apparatus 14 Hand brake lever main body 18 Push rod 20 Operation knob 52 Knob main body 54 Knob cover 56 Engagement claw 58 Engagement hole 60 Contact surface 62 Back surface 64 Thick part 66 Taper part 68 Outer round part 70 Inner round part

Claims (4)

A knob body having a pair of engaging claws attached to the tip of a bush rod that is movable with respect to the hand brake body, and an engaging hole that engages with the engaging claws to cover the knob body A hand brake knob structure including a knob cover,
The engaging claw is provided so as to project outward from the back surface of the knob body from the back surface of the knob body, which is a position closer to the shaft core side than the contact surface of the knob body with the knob cover. Hand brake lever knob structure featuring In claim 1,
The engagement claw has a thick portion on the connection portion side with the knob main body, and has a tapered portion that gradually becomes thinner from the thick portion toward the protruding tip. Lever knob structure. In claim 1 or 2,
The knob structure of a hand brake lever, wherein the engaging claw has an outer rounded portion outside a connecting portion with the knob body. In any one of Claims 1-3,
The engaging claw has an inner rounded portion inside the connecting portion with the knob body,
The inner radius portion is formed at a position away from the rear surface of the knob body.

Images