JPS6321072Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stepping mechanism that switches states by performing step-by-step movements over at least three positions in each reciprocating manner. In addition, it is an object of the present invention to provide a stepping mechanism that exhibits an excellent function of being able to perform any desired jumping operation.

Hereinafter, one embodiment of the present invention applied to a switch device used for driving wipers of an automobile will be explained with reference to the drawings. First, in FIG. 1, 1 is a switch base, and 2 is a switch base 1. In the figure, the contact plate on the fixed side is arranged in four stages of positions, (', ', ','), and the '' position is when the wiper is stopped, so-called off.
The 'position' is the wiper's intermittent operation, the '' position is the wiper's low-speed continuous operation, and the '' position is the wiper's high-speed continuous operation. 3 is a contact holder that elastically holds the movable contact plate 4 that slides on the fixed contact plate 2, and 5 is an operation unit box on the switch base 1, the lower part 5 of which
A movable element 6 is housed in the space a, which moves over the four positions (' to ') above, using the inner bottom surface of the stepped portion as a predetermined board surface. Also, at this time, the movable element 6 passes through the through groove 7 at the bottom of the lower step portion 5a.
The lower protrusion 8 is engaged with the upper concave portion 9 of the contact holder 3, so that the contact holder 3 moves together with the mover 6. Incidentally, the mover 6 and the contact holder 3 may be formed integrally. On the other hand, 10, 11, 12 and 13, 14,
Specifically, as shown in FIG. 2, reference numeral 15 denotes engaging protrusions arranged in rows to the left and right on one side and the other side of the upper surface of the mover 6, respectively, of which the engaging protrusions 10 and 13 at the first stage are arranged in rows, respectively, in the leftward and rightward directions. In contrast to the square shape, the remaining engaging protrusions 11, 12 and 14, 15 are all in the shape of a right triangle, and each row has extra flat surfaces 16 and 1 on the left side and right side, respectively.
7 left. Incidentally, reference numerals 18 and 19 are elastic tongue pieces formed at respective outer positions of the above-mentioned engaging protrusions 10, 11, 12 and 13, 14, 15 by integral molding with the slider 6, and each has a protrusion at its tip. 18a and 19a. On the other hand, 20 indicates the lower part 5a and the upper part 5 of the operation unit box 5.
It is a partition frame part existing at the boundary between
The projecting wall 22 adjacent to the rows 3, 14, and 15 is extended,
Further, on both sides of the lower surface, recesses 23 and 24, which constitute a holding mechanism together with the elastic tongues 18 and 19 by engaging with the protrusions 18a and 19a of the elastic tongues 18 and 19, respectively, are provided. For example, six (at least four in this embodiment) are formed in a continuous wavy manner so as to cover each stage of movement of the child 6. Now, with respect to the lower part 5a of the operating unit box 5 in which the slider 6 is housed as described above, the upper part 5b is wider both to the left and right in FIG. It contains 25 children. Further, a leaf spring 26 as shown in FIG. 2 is held on the lower surface of the shifter 25, and half of the leaf spring 26 rests on the projecting wall 21, and the remaining half rests on the engaging protrusion 10. The hooking piece 27 has a hooking piece 27 that faces the hooking protrusion 15 in a close state, and a hooking piece 28 that has half of it resting on the projecting wall 22 and the remaining half that faces the hooking protrusion 15 in a spaced state. Reference numerals 29 and 30 are springs installed toward the shifter 25 from the left and right ends of the upper section 5b, respectively, which hold the shifter 25 at the center of the upper section 5b. so that it is always in a neutral position,
In addition, stoppers 31 and 32 are provided at the right and left sides of the transfer element 25 held in this manner, respectively, in the upper section 5b, and these are also placed at the right end of the upper section 5b. The engagement protrusions 11, 12 and 1 are removed from the transfer element 25 by springs 33 and 34 as elastic holding means, which are installed from the left side end to the respective stoppers 31 and 32.
4 and 15, and on the other hand, on the opposite side of each anti-induction element 25, the above-mentioned engaging protrusion 1 is provided between the right end and the left end of the upper stage part 5b, respectively.
There are two spare spaces 35 and 36 left, corresponding to 1, 12 and 14, 15. Incidentally, numeral 37 is an operating lever that responds to, for example, a lever operation of the automobile, and is engaged with a concave portion 38 of the transfer element 25.

Therefore, in the case of this embodiment configured as above,
Now, when a lever (not shown) of the automobile is operated to move the operating rod 37 to the right in FIG. Since the contact holder 3 is engaged with and pushed by the contact holder 3, the mover 6 also moves in the same direction together with the contact holder 3. At this time, the mover 25 that has been moved as described above hits the stopper 31 when the mover 6 has been moved by one (one pitch) of the engaging protrusions 11, 12 and 14, 15, and is not moved further. Since the movement is temporarily restricted, if you stop any further operation based on the resistance you feel, the transfer element 25
returns to its original position under the force of the spring 30. However, the mover 6 advances the engagement stage between the protrusion 18a of the elastic tongue piece 18 and the recess 23 and the engagement stage between the protrusion 19a of the elastic tongue piece 19 and the recess 24 in the holding mechanism by the above-mentioned movement. Since they are still in each of the engaged states, they do not return and remain in the position after the movement, so that the transfer element 25 causes the engagement piece 27 to cross over the slanted surface of the engagement protrusion 11 next to the engagement protrusion 10, and then moves independently. The contact holder 3 as well as the movable member 6 remain in the position after the movement, in this case and the position '', causing the wiper to perform intermittent operation (see FIG. 3). Then, when the aforementioned lever is operated again in the same manner as described above, the same process as described above is performed, except that in this case, the shifter 25 pushes the upright surface of the engaging protrusion 11 that has been crossed by the engaging piece 27 as described above, and moves the mover 6. Therefore, if the contact holder 3 is further moved to the right from FIG. 3, and when the mover 6 hits the stopper 31, no further operation is performed, and the movement is repeated in the same manner as described above. Leaving the mover 6 remaining at the later position, the mover 25 causes the engagement piece 27 to cross over the slanted surface of the engagement protrusion 12 and returns independently, while the remaining mover 6 as described above at this time and Since the contact holder 3 remains at the same position, the wiper is operated continuously at a low speed (see FIG. 4).
By the way, regarding the return of the transfer element 25 at this stage, if the engagement piece 28 on the other side forming a pair with the engagement piece 27 moves and returns in the lowered state shown in FIG. At this time, the hooking piece 28
The engaging protrusion 15 on the other side is close to and opposite to the
is pressed against the upright surface as the engaging piece 28 returns, thereby causing the mover 6, which should remain in the position after movement as described above, to return to the position before movement together with the contact holder 3, or Alternatively, there is a fear that the return of the transfer element 25 and, furthermore, the return of the operating lever may be hindered and become impossible. However, in this embodiment, each time the transfer element 25 moves as described above, the hooking piece 28 elastically rides on the projecting wall 22 which is in a stationary state, and is unable to return from the position where it rides on. As a result, the wiper moves over the engaging protrusion 15 without hitting the upright surface of the engaging protrusion 15, so that the set wiper operating state is maintained without returning the slider 6 (contact holder 3). Moreover, it does not interfere with the return of the transfer element 25 or the return of the operating lever. Therefore, subsequent lever operations can be performed in the same manner as described above, and when the lever is operated in the same manner as described above, the engaging piece 27 will push the upright surface of the engaging protrusion 12 and move the slider 6. Therefore, if the contact holder 3 is further moved to the right from FIG. 4, and if the mover 6 touches the stopper 31 and no further operation is performed at this time, the movement will be completed in the same manner as described above. The transfer element 25 leaves the mover 6 remaining at the position of
is caused to slide on the flat surface 16 by the engaging piece 27 and returns independently, and on the other hand, as mentioned above, the remaining mover 6 remains at the position ' and ', so the contact holder 3 also remains at the same position. This causes the wiper to operate continuously at high speed (see Figure 5).
Also, at this time, the hooking piece 28 rides on the projecting wall 22.
Since it crosses the next engaging protrusion 14 by returning from the position where it ran over, the above-mentioned inconvenience does not occur. Further, no matter how the lever is operated in the same direction as described above, there is no engaging protrusion on the flat surface 16 that the engaging piece 27 presses, and the engaging piece 27 does not come into sliding contact with the flat surface 16. There is no change in the state since it is only repeated. However, when the above-mentioned lever is operated in the opposite direction and the operating rod 37 is moved to the left in FIG. Push the upright surface and twist the mover 6
and contact holder 3 are each moved to the left in FIG. Therefore, if this is repeated step by step within the range where the transfer element 25 hits the stopper 32 and is subject to some restrictions, the result shown in FIG. Figure 3 (wiper/intermittent operation)
The state shown in Fig. 1 (wiper
(off) state.

Now, in response to the above, even after operating the transfer element 25 from the state shown in FIG. When the slider 6 is fully operated, the latch protrusion 10 is pushed in by the latch piece 27. In this case, the mover 6 is moved together with the contact holder 3 from the 'position' to the 'position'. This allows the wiper to skip between intermittent operation and low-speed continuous operation and to be set to high-speed continuous operation all at once, so it can be used even in times of sudden heavy rain, when going through each stage one by one would be too slow. can be quickly responded to, making it very convenient and also greatly improving safety. The state obtained in the manner described above is as shown in FIG. 3
In this case, when the engaging protrusion 1 is moved fully to the left by the force exceeding the holding force of 4, the engaging protrusion 1 is moved by the engaging piece 28.
3 is pushed in, the mover 6 together with the contact holder 3 is moved all at once from the above and ' positions to the original and ' positions, thereby causing the wiper to skip through the low-speed continuous operation and intermittent operation states. It can be returned to the off state at once, making it convenient as described above.

The present invention can be applied not only to the wiper drive of automobiles, but also to other applications, and of course can be applied to other applications besides automobiles. If the number of stages is small, it may be possible to make a stepping motion over three positions in each reciprocation, and to be able to operate by skipping only one intermediate stage.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but may be implemented by appropriately changing the specific shape and structure of each part within the scope of the invention. .

In summary, according to the present invention, the mover is basically moved forward or backward one step at a time by a one-time movement operation with automatic return of the mover, and is kept at the forward or backward position. It is possible to reliably change the state by stepping motion,
And even the complicated movement can be smoothly achieved without causing problems such as returning the mover that should be kept in the forward or backward position, or preventing the return of the mover. It has many valuable practical effects, such as being able to move the child not one step at a time but by jumping over at least one step, making it very convenient.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an overall sectional view, Fig. 2 is an exploded perspective view of a portion related to stepping, and Figs. 3 to 5 show different operations in order. It is a sectional view of the whole in a state. In the figure, 5 and 5b are the operating unit box and its upper part, 6 is the mover, 10, 11, 12 and 13, 14, 15 are the engaging protrusions, 18 and 19 are the elastic tongues (holding mechanism), and 21 and 22 is a projecting wall;
23 and 24 are recesses (holding mechanisms), 25 is a feeder, 27 and 28 are engagement pieces, 29 and 30 are springs, 31 and 32 are stoppers, 33 and 34
is a spring (elastic holding means), 35 and 36 are extra spaces, and 37 is an operating rod.

Claims (1)

[Scope of utility model registration request] A mover that is arranged to move reciprocatingly over a predetermined board surface over at least three positions, and has engaging protrusions arranged in rows in the direction of movement, and which are arranged in a row in the direction of movement in both directions of the movement; and a mover that is always at a neutral position. is provided so that it can be moved reciprocally over the movable element in the same direction as the movable element and over a width equivalent to at least two steps of the movable element by means of an operating means that resists the biasing force. A movable element that holds and has respective latch pieces for reciprocation that engage with and push the latch protrusions in the moving direction, and move the movable element; a stopper held by an elastic holding means to limit the movement of the mover to a width equivalent to one step; and a holding mechanism provided at each step of the mover to keep the mover at each position after the movement. and each latch for each reciprocation, which is provided on the side where the latch piece of the transfer element is present and at a position adjacent to the latch protrusion, and maintains a stationary state when the transfer element is moved. and projecting walls for reciprocating each of the pieces to elastically ride the piece opposite to the moving direction to a position beyond the engaging protrusion, and the stopper is elastically held by the mover. A stepping mechanism characterized in that when a force exceeding the holding force of the means is received, the stepping mechanism moves backward to allow the movement of the feeder by at least two steps with respect to the mover.