JPS6143099Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a piezoelectric ignition device that can be applied to small objects with a total length of about 40 to 50 mm. In addition to integrally forming the exposed sliding tube,
A sliding groove having an engaging edge corresponding to the sliding direction of the hammer is formed in the sliding tube, and a synthetic resin slider with a square cross section in which a striking spring and a hammer are sequentially fitted is inserted into the sliding tube. In a piezoelectric ignition device that is slidably fitted into a cylinder and has an engagement pin that projects from the outer periphery of the hammer and projects into a groove formed on the periphery of the slider, the piezoelectric ignition device corresponds to the striking head fitting of the slider. A protrusion protruding outward on a diagonal line of the end face portion to be inserted is formed, and an insertion groove for an engagement pin, which is an enlarged part of the fitting hole into which a hammer or the like is fitted, is formed in the protrusion with an axial direction. , the inner end of the insertion groove is provided in communication with the groove in the radial direction, and the sliding tube has a second sliding groove in which the protrusion of the slider is slidably fitted. The groove is characterized in that it is formed diagonally and continuously on a part of the inner circumference of the groove.

A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes an interior case of the piezoelectric element 7, which is integrally formed with a sliding tube 2 having a rectangular cross section in which the striking head fitting 8 of the element 7 is exposed at the inner part, and two corresponding walls of the tube 2. A sliding groove 3 having a stepped engagement edge 4 corresponding to the sliding direction of the hammer 22 is formed on the inner surface of the hammer 22, and a movement allowing groove 5 long in the axial direction is formed on the other two corresponding wall surfaces. A one-pole terminal plate 9 provided on the piezoelectric element 7 protrudes from one outer periphery of the inner case.

Reference numeral 11 denotes a slider with a rectangular cross section formed of synthetic resin and slidably fitted into the sliding tube 2, in which the impact spring 21 and the hammer 22 are sequentially attached from the end face facing the impact head fitting 8. A fitting groove 12 is provided in which the hammer 22 is fitted, and a cam groove 13 having inclined surfaces 14 and 15 symmetrically formed at the corners is provided on two opposing sides as an example of the groove of the present invention. Engagement pins 23 protruding in both directions are made to protrude into the cam groove 13.

The slider 11 is further formed with hook-shaped protrusions 16 on the outside of two sides, and the hook-shaped protrusions 16 of the slider 11 are fitted into the sliding tube 2 with a return spring 17 applied thereto so as to be freely slidable. It is fitted into the movement allowance groove 5 from the inside.

In order to miniaturize the slider 11, the fitting groove 12 of the hammer 22 is formed to have a relatively large diameter, and the engaging pin 23 has a larger protrusion than the inner diameter of the fitting groove 12.
is close to the length L between the corresponding ridge angles on the diagonal line of the slider 11 as shown in FIG. Protrusions 18, 18 are formed at the diagonal edges of the child 11, and an insertion groove 19 into which the engagement pin 23 is fitted is formed in communication with the engagement groove 12, and each insertion groove 19 The inner end of the cam groove 13 is connected to a communication hole 20 that communicates with the abdomen, which is the middle of the cam groove 13 in the length direction.

Further, a second sliding groove 6 is provided on the inner surface of the sliding tube 2 diagonally and communicating with the sliding groove 3. (5th,
(Fig. 7) In the above embodiment, the fitting hole 12 of the slider 11
The impact spring 21 is then placed in the engagement pins 23, 2.
3 is inserted into the insertion grooves 19, 19, and the hammer 22 is fitted into the fitting hole 12, the engagement pin 23,
23 comes out into the continuous bullet hole 20 and then fits into the cam groove 13, and slides on the inclined surface 15 by the elasticity of the impact spring 21, causing the hammer 22 to protrude slightly.

Therefore, after storing the return spring 17 in the sliding groove 3, aligning the protrusions 18, 18 with the second sliding groove 6 provided in the sliding groove 3, and fitting the slider 11 into the sliding tube 2, When the hook protrusion 16 is pushed and fitted into the movement allowance groove 5 while slightly deforming the sliding tube 2, the slider 11 is pushed out a little by the elasticity of the return spring 17 until the hook-shaped protrusion 16 comes into contact with the groove edge 5a. Then, pull the hammer 22 away from the striking head fitting 8 (FIGS. 1 and 2).

When the slider 11 is pushed in against the elasticity of the return spring 17 in the assembled state shown in FIGS. 1 and 2, the engagement pin 2
3 is in contact with the engaging edge 4, followed by the pin 23
is in contact with the inclined surface 15 of the cam groove 13, so the engagement pin 23 and the hammer 22 rotate in a direction in which the engagement pin 23 is disengaged from the engagement edge 4, and at the same time as the engagement is disengaged, the hammer 22 is struck. The spring 21 causes the ignition action to suddenly protrude from the end face of the slider and strike the striking head metal fitting 8.

As clarified by the description of the above embodiments, the present invention is such that the slider 11 protrudes from the ridge corner of the diagonal on the inner end face of the slider 11 in FIG. A second protrusion 18 on a diagonal line is formed, and an insertion groove 19 is provided therein for the engagement pin 23 to pass through, and a second diagonal hole is communicated with the sliding hole inside the sliding tube 2 integrally provided with the interior case 1. Since the structure is provided with the sliding groove 6, even if the inner case 1, the sliding tube 2, and the slider 11 are made compact for downsizing, the engagement pin 23 protruding from the hammer 22 to the outer periphery will not slide easily. The axially movable fitting of the slider 11 into the slider 11 and the axially movable fitting of the slider 11 into the sliding tube 2 can be easily carried out without sacrificing an increase in size, and it is particularly compact. This has the effect of making it possible to manufacture a piezoelectric ignition device.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal side view, Fig. 2 is a longitudinal side view during ignition operation,
3 is a vertical side view of the interior case 1, FIG. 4 is a side view showing the assembly of the slider 11 and hammer 22, FIG. 5 is an exploded perspective view of the same, and FIG. 6 is a side view of the slider 11.
FIG. 7 is an end view of the interior case 1. FIG. 2... Sliding tube, 6... Second sliding groove, 7... Piezoelectric element, 8... Hitting head metal fitting, 11... Slider, 1
2... Fitting hole, 18... Protrusion, 19... Insertion groove,
21...Strike spring, 22...Hammer, 23...
Engagement pin.

Claims (1)

[Scope of utility model registration request] The interior case 1 of the piezoelectric element 7 is integrally formed with a sliding tube 2 in which the striking head fitting 8 of the element is exposed at the inner part, and the sliding tube 2 is provided with an engagement corresponding to the sliding direction of the hammer 22. A synthetic resin slider 11 with a square cross section, in which a sliding groove 3 with a mating edge 4 is formed and a striking spring 21 and a hammer 22 are sequentially fitted therein, is slidably fitted into the sliding tube 2; In a piezoelectric ignition device in which an engaging pin 23 protruding from the outer periphery of a hammer 22 is protruded into a groove 13 formed on a circumference of a slider 11, an end surface of the slider 11 corresponding to the striking head fitting 8 is provided. A protrusion 18 protruding outward on a diagonal line of the part is formed, and an insertion groove 19 for an engaging pin 22, which is a partially enlarged part of the fitting hole 12 into which a hammer 22 etc. is fitted, is formed in the protrusion 18 in the axial direction. the insertion groove 1
9 is provided so as to communicate with the cam groove 13 in the radial direction, and the sliding tube 2 is provided with a second sliding groove 6 into which the protrusion 18 of the slider 11 is slidably fitted. , A piezoelectric ignition device characterized in that the groove portion 13 is formed diagonally in a continuous manner with a part of the inner periphery of the hole.