JPH04213679A - Locking mechanism and latch device using same mechanism - Google Patents

Abstract

PURPOSE:To simplify construction by binding only the side surface of a rectangle link shaped trace member in contact with a member equipped with circulation cam grooves of mutually different shapes on the surfaces facing each other respectively, and circulating the trace member in a specified direction by means of the pressure from the groove wall surfaces when movement takes place. CONSTITUTION:A heart shaped cam 32 and a cam groove 20 are provided on one side of a circulation cam groove installing member 18 of a locking device 10, which makes blocking and releasing by push-pressing operation, and a circulation cam groove 22 of a different shape is provided on the other side. A part of the rectangular link of a trace member 14 is cut out so as to keep it from coming in contact with the bottom portion of the cam groove of the installing member 18 thus trace portions 24, 26 are formed. The member 18 is then secured to the fixed side and the member 14 is secured to the movable side in a freely oscillating manner. The trace member 14 then circulates in a specified direction by means of the wall surface pressure caused when push- pressing operation is applied. Thus, the construction can be simplified.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a locking mechanism that maintains or releases the closed state or contained state of the lid or box by pressing the front surface of the lid or box, and a latch inside the housing. The present invention relates to a latch device that locks a body in a pushed state and an extracted state.

[Prior art]

A push-open ashtray is installed in the center cluster of an automobile, and the ashtray automatically slides out when the lid is pressed.

This push-open type ashtray is provided with a locking mechanism 180 as shown in FIG. 16. In this locking mechanism 180, when the front part of an ashtray (not shown) is pushed in the direction of arrow I, a tracing member 184 attached to the rear end of the ashtray is inserted into a heart-shaped circulation cam groove 182 attached to a box 182. The inserted tracing member 184 circulates within the heart-shaped circulation cam groove 182 by the pressing operation, and when the tracing member 184 engages with the recess 192 of the heart-shaped circulation cam groove 182, the ashtray is pushed in. It has a structure that holds it in place.

By the way, the locking mechanism 18 shown in FIGS. 16 and 17
0, the tracing member 184 is in the circulation cam groove 182.
A stepped portion 188 was provided so that the trace member 184 could be circulated in a certain direction (arrow H direction), and the tracing member 184 was prevented from circulating in the opposite direction.

Further, a biasing means 190 for biasing the tip end 186 of the tracing member 184 into the circulation cam groove 182 is separately provided to ensure that the tip end 186 of the tracing member 184 is pushed into the circulation cam groove 182.
It had a structure in which it circulated by sliding on the bottom of the 82 grooves.

However, in the mechanism in which the distal end 186 of the tracing member 184 slides on the groove bottom surface of the circulation cam groove 182, the circulation cam groove 182 is worn out and deformed due to friction between the groove bottom surface and the distal end 186 of the tracing member 184. In addition, the stepped portion 188 is shaved off, resulting in the inconvenience that the tracing member 184 circulates in the opposite direction.

Further, when the ashtray is in the pushed-in state, the tracing member 184 is locked in a recess 192 formed in the circulation cam groove 182,
The ashtray is maintained in its pushed-in state against the biasing force of a compression coil spring (not shown). However, since the biasing force of the compression coil spring is supported at one location in the recess 192, the recess 192 is easily damaged and the breaking strength of the lock mechanism 180 is reduced.

Furthermore, in order to urge the tip end 186 of the tracing member 184 toward the inside of the circulation cam groove 182, a separate urging means 1 is provided.
90, the number of parts increased and the installation performance of the tracing member 184 deteriorated.

Furthermore, the trace member 184 is usually molded into a lever shape from a metal material, but if the machining accuracy is poor during this molding, the circulation cam groove 182 may be scraped, or the trace member 184 may be damaged due to frictional resistance with the circulation cam groove 182. In some cases, the member 184 was deformed.

On the other hand, in order to latch the opening/closing lid of an audio device or the like, the opening/closing lid is provided with a latch device in which the latch body is locked into the housing in a pushed state and an extracted state.

This latch device incorporates the above-mentioned locking mechanism 180, and when the latch body is pressed, the tracing member moves within the heart-shaped circulation cam groove.
When the locking arm formed on the latch body is pressed against the housing, the locking arm clamps or opens a striker attached to the opening/closing lid, thereby opening or closing the opening/closing lid. .

However, in the latch device to which the locking mechanism 180 described above is applied, the circulation cam groove 1 formed in the latch body
Since it is necessary to form a stepped portion 188 at 82 and to provide biasing means 190 at tracing member 184, a required thickness is required for the housing that accommodates this latch body and tracing member. Therefore, it has been difficult to reduce the thickness of the latch device beyond this restriction.

[Problem to be solved by the invention]

In consideration of the above facts, the present invention provides a locking mechanism that has a small number of parts, can prevent wear of the circulation cam groove, and has high breaking strength, and also provides a thin latch device using this locking mechanism. With the goal.

[Means to solve the problem]

The locking mechanism according to claim (1) is a locking mechanism composed of a first locking member and a second locking member that have a function of holding or releasing a closed state or a housed state of a lid, a box, etc. , a pair of circulation cam grooves formed in different groove shapes in different parts of the first locking member, and a pair of circulation cam grooves provided in the second locking member to maintain a non-contact state with the groove bottom surface of the circulation cam groove. When inserted into the circulation cam groove, the circulation cam groove is pressed by the groove wall surface of the circulation cam groove due to the relative movement with the first locking means, and the restoring force in the circulation direction of the torsional force generated by this pressing forces the circulation cam groove. It is characterized in that it has a tracing means that circulates in the circulation direction within the circulating cam groove and alternately maintains an engaged state or a non-engaged state with the circulation cam groove.

The latch device according to claim (2) includes a housing fixed to a mounting plate or the like, a latch body inserted into the housing and biased in the extraction direction, and a circulation cam groove formed in the latch body. , a latch device comprising: a trace member that circulates within the circulation cam groove each time the latch body is pushed in and maintains the latch body being pushed into the housing and pulled out alternately; The tracing member is characterized in that it is constituted by the locking mechanism according to claim (1).

[Effect]

In the locking mechanism according to claim (1), the second
When the trace member provided on the lock member is inserted into the pair of circulation cam grooves provided on the first lock member, it circulates in the circulation cam groove in a fixed direction by relative movement with the first lock member.

Here, the tip of the tracing member is inserted so as not to contact the bottom surface of the circulation cam groove of the first locking member, and the side surface of the tip of the tracing member only contacts the groove wall surface of the circulation cam groove, so the circulation cam The bottom surface of the groove is not worn away by the tracing member.

On the other hand, since the shapes of the pair of circulation cam grooves are different from each other, the tracing member that traces the circulation cam grooves is the first one.
Due to the relative movement with the locking member, it circulates in the circulation cam groove while being pressed and torsionally applied from the groove wall surface of the circulation cam groove. Therefore, the tracing member is urged in the circulation direction by the restoring force due to the torsion of the tracing member. Therefore,
Even without forming a stepped wall to prevent the trace member from returning in the circulation cam groove, the trace member circulates in a fixed direction without returning.

Furthermore, since the tracing member is inserted into the pair of circulating cam grooves, the tracing member is held at two locations on the second locking member.

In the latch device according to claim (2), the tracing member circulates through the circulation cam groove every time the latch body is pushed in, and holds the latch body alternately in a pushed state into the housing and in a pulled out state.

The structure of this trace member and circulation cam groove is defined in claim (1).
Since it is the same as that, the explanation of the action will be omitted.

[Embodiment] FIGS. 1 and 2 show a first embodiment of a locking mechanism 10 according to the present invention applied to a push-open type ashtray.

This locking mechanism 10 includes an ashtray case 12 (see Fig. 2).
The trace member 14 attached to the back surface 12A on the insertion side of
and a pair of circulation cam grooves 20, 2 formed on both sides of the circulation cam groove mounting portion 18 provided on the right side of the box 16 in the drawing.
It is composed of 2. The trace member 14 is attached at a position corresponding to the circulation cam grooves 20 and 22,
When the front part 12A of the ashtray case 12 is pushed in the direction of arrow A, the tracing member 14 moves into the pair of circulation cam grooves 20,
22.

The tracing member 14 has a substantially U-shape in which a part of a rectangular ring is cut out, and the circumferential side surfaces of this notch are used as trace parts 24 and 26. This trace section 24, 2
The interval t between the tips of the trace members 14 and 26 is larger than the interval between the groove bottoms of the circulation cam grooves 20 and 22, and when the trace parts 24 and 26 of the trace member 14 are inserted into the circulation cam grooves 20 and 22, the trace parts The tips of 24 and 26 are the circulation cam grooves 20,
The trace portions 24 and 26 do not contact the bottom surface of the groove 22, but contact the wall surface of the groove and move in circulation.

Note that the tracing member 24 is attached to the back surface 12A of the ashtray case 12.
Although it is swingably supported by the
8 and 30 are formed to limit the swing width of the trace portions 24 and 26 in the direction of arrow B.

As shown in the first diagram, the circulation cam grooves 20 and 22 are formed in different shapes, with the circulation cam groove 20 in the upper part of the drawing of the circulation cam groove attachment part 18 and the circulation cam groove 22 in the lower part. .

As shown by the solid line, the circulation cam groove 20 has a shape in which a convex heart cam 32 is left uncut approximately at the center above the circulation cam groove mounting portion 18 . A groove wall surface 34 is provided on the insertion end side of the tracing member 14 in the width direction, and a protrusion 38 is formed in the center thereof toward the heart recess 36 of the heart cam 32.

On the other hand, the circulation cam groove 22 shown by the broken line also includes the circulation cam groove 22.
0, the heart cam 40, groove wall surface 42, and protrusion 44 are formed with different shapes, and the trace portion 24 that circulates in the circulation cam groove 20 and the trace portion 26 that circulates in the circulation cam groove 22 are formed on the groove wall surface. They are pushed apart so that they are separated from each other.

The heart recess 36 provided in the circulation cam groove 20 is provided at a position slightly shifted in the direction of arrow A from the heart recess 46 in plan view. This is done by first engaging either the tracing part 24 and the heart recess 36 or the tracing part 26 and the heart recess 46 in consideration of the tolerances of the tracing parts 24 and 26, thereby reliably locking the tracing member 14. It's for a reason.

Note that this misalignment between the heart recesses 36 and 46 is eliminated because the trace member 14 expands due to the biasing force of a compression coil spring (not shown), and the engaged trace member 14 is released at two points, the heart recess 36 and the heart recess 46. supported (see Figure 7).

Further, although the circulation cam groove 22 is formed with groove wall surfaces 48 and 50 on both sides in the width direction along the insertion direction of the tracing member 14, the circulation cam groove 20 is not formed with groove wall surfaces. This is because the tracing portion 24 is pressed toward the wall surface of the heart cam 20 by the torsional force of the tracing member 14 and does not move outside the circulation cam groove 20.
Even if the trace part 24 is separated from the heart cam 20, the restoring force due to the torsion of the trace member 14 will cause the trace part 2 to move away from the heart cam 20.
4 is guided to the insertion portion 32 of the circulation cam groove 34 following the tracing portion 26, so there is no need to form a groove wall surface for guiding the tracing member 24 in the circulation cam groove 20.

Note that the insertion portions 52 of the tracing members 14 in the circulation cam grooves 20 and 22 are processed into a tapered shape so that the tracing members 14 can be easily inserted.

Next, the operation of this embodiment will be explained based on FIGS. 2 to 11.

From the state shown in Fig. 2, point the front 12B of the ashtray case 12 to
When pressed in the direction, the trace parts 24 and 26 of the trace member 14 attached to the back surface of the ashtray case 12 move into the circulation cam grooves 20 and 22 formed on both sides of the circulation cam groove attachment part 18 attached to the box 16. (3rd
figure).

When the front surface 12B of the ashtray case 12 is further pressed in the direction of arrow A, the tracing portion 26 of the tracing member 14 is guided along the groove wall surface 50 of the circulation cam groove 22. on the other hand,
Since no groove wall surface is formed in the insertion portion 52 of the circulation cam groove 20, the trace portion 24 moves following the trace portion 26.

Next, as shown in FIG. 4, when the front surface 12B of the ashtray case 12 is further pressed in the direction of arrow A, the trace portion 24
is guided by the groove wall surface 50 and moves in the direction of arrow D. On the other hand, the trace portion 26 is the heart cam 32A of the circulation cam groove 20.
The trace section 2 moves in the direction of arrow C.
4 and the trace portion 26 gradually shift in the direction of separation, and a twisting force is generated in the trace member 14.

Next, as shown in FIG. 5, when the trace section 24 reaches the corner 32B of the heart cam 32, the displacement between the trace section 24 and the trace section 26 becomes maximum, and the torsional force becomes maximum.

Next, as shown in FIG. 6, when the front surface 12B of the ashtray case 12 is pressed in the direction of arrow A from the state shown in FIG.
Due to the torsional restoring force of the trace member 14, the trace portion 2
4 moves over the corner 32B of the heart cam 32 in the direction of the arrow D, and the trace part 24 collides with the convex part 38A of the groove wall surface 34 to produce a click sound and eliminate the positional deviation with the trace part 26.

Next, as shown in FIGS. 6 and 7, when the overstroke of the pressing operation is canceled by the biasing force of a compression coil spring (not shown), the trace member 14 moves in the direction of arrow B. At this time, the tracing section 24 is connected to the heart cam 3.
2, while the trace portion 26 is guided by the wall surface 32C of
It is guided by the convex portion 44A of the groove wall surface 44 of the circulation cam groove 22. That is, since the trace portion 24 is pressed in the direction of arrow D and the trace portion 26 is pressed in the direction of arrow C, the trace member 14 is twisted. Here, when the trace member 14 further moves in the direction of arrow B, the trace part 26 separates from the groove wall convex part 44A, and the positional deviation with the trace part 24 is eliminated by the restoring force.

Therefore, the trace parts 24 and 26 whose positions have been corrected are guided by the wall surface 32C and are locked in the heart recesses 36 and 46.

Here, since the tracing member 14 is prevented from being pulled out at two locations, the heart recesses 36 and 46 on both sides, the tracing member 14 can be firmly locked.

Next, as shown in FIG. 8, when the front surface 12B of the ashtray case 12 is overstroked in the direction of arrow A from the locked state of the tracing member 14, the tracing portion 26 is guided by the wall surface 40A of the heart cam 40, and the tracing portion 26 is guided by the wall surface 40A of the heart cam 40.
is guided by the groove wall convex portion 38B and moves in the direction of arrow D. This causes the trace member 14 to twist again. Note that since the heart recesses 36 and 46 are formed to be offset from the tip of the groove wall convex portion 44A in the direction of arrow D, the trace portions 24 and 26 will not circulate in the opposite direction when overstroked.

Next, when the front surface 12B of the ashtray case 12 is further overstroked in the direction of arrow A, the tracing portion 26 overcomes the tip of the wall surface 40A due to the restoring force of the tracing member 14, eliminates the positional deviation with the tracing portion 24, and then The state shown in Figure 9 is reached.

In the state shown in FIG. 9, the overstroke of the tracing member 14 is at its maximum, and when the pressure in the direction of arrow A is released,
The trace member 14 is pushed back in the direction of arrow B by the bias of a compression coil spring (not shown). However, the trace portion 26 is interfered with by the corner portion 40B of the heart cam 40 and cannot be moved in the direction opposite to the circulation direction.

Further, as shown in FIG. 10, when the compression coil spring pushes back the tracing member 14 in the direction of arrow B,
, 26 are the wall surface 32D of the heart cam 32 and the circulation cam groove 2.
0, the tracing member 14 is guided by the wall 48 of arrow B
move in the direction.

Next, as shown in FIG. 11, when the tracing member 14 is further removed, the tracing portion 26 is inserted into the circulation cam groove 22.
It moves in the direction of arrow C guided by the wall surface 48 of. on the other hand,
Since the tracing portion 24 is guided by the wall 32E of the heart cam 32 and moves in the direction of arrow D, the positions of the tracing portion 24 and the tracing portion 26 are shifted, and a twisting force is generated in the tracing member 14 again.

Further, the tracing portion 24 is connected to the tip portion 32 of the heart cam 32.
When positioned at F, the displacement between the trace portions 24 and 26 is maximum, and the torsional force is maximum.

Here, when the tracing member 14 further moves in the direction of arrow B by pushing back the compression coil spring, the tracing portion 2
4 leaves the tip 32F of the heart cam 32, the positional deviation between the tracing portions 24 and 26 is eliminated by the restoring force due to the torsion of the tracing member 14.

When the tracing member 14 is further pulled back by the compression coil spring, the tracing member 14 is pulled back into the circulating cam grooves 20, 22.
The ashtray case 12 is removed from the box 16 (see FIG. 2).

In this embodiment, the locking mechanism 10 according to the present invention is applied to a push-open type ashtray, but the invention is not limited to this. For example, it can also be used as a means for locking an opening/closing lid. can.

Next, a second embodiment of the present invention will be described.

In the first embodiment, the fixed part 13 (the first
The tracing member 14 is circulated in a fixed direction by the restoring force caused by the torsional force in the case (see figure). In contrast, in this embodiment, as shown in FIG. 12, the tracing member 60 is circulated in a fixed direction by the restoring force due to the bending moment (in the direction of arrow E) at the fixed portion 62 of the tracing member 60. ing.

That is, the circulation cam grooves 20 and 22 described in the first embodiment are provided on one side of the circulation cam groove mounting portion 64, and the trace portions 66 and 68 are inserted into the circulation cam grooves 20 and 22 in the direction of arrow F and circulate. The displacement in the direction of arrow G generates a bending moment in the trace member 60, and the restoring force caused by this bending moment causes the trace member 60 to circulate in a certain direction.

According to this, it is not necessary to provide the circulation cam grooves 20 and 22 on both sides, so that the lock mechanism 58 can be made thin.

Next, a third example will be described.

FIG. 13 shows a latch device L to which the lock mechanism 10 according to the present invention is applied.

The latch device L includes a housing 110 in which a latch body 112 is housed.

The housing 110 has a box shape with a predetermined wall thickness, and the latch body 112 is inserted through an opening 114 formed at one end in the longitudinal direction. A rectangular frame 116 for attaching the housing 110 to an audio device or the like is formed in the opening 114, and corresponding projections 118 (see FIG. 14) are formed on both sides of the housing 110. As a result, a mounting plate (not shown) is sandwiched between the rectangular frame 116 and the protrusion 118, and the housing 110 is fixed.

Latch body 112 inserted into this housing 110
As shown in FIG. 15, it has a substantially rectangular parallelepiped shape, and a circular hole 130 is formed along the longitudinal direction from the insertion tip. A compression coil spring 122 is accommodated in this circular hole 130. A portion of the compression coil spring 122 protrudes from the circular hole 130 and is fitted into a spring receiver 124 formed protruding inside the housing 110. As a result, the latch body 112 is always urged in the direction of pulling out from the housing 110 by the compression coil spring 122.

Recesses 130 are formed in the top surface 126 and the bottom surface (not shown) of the latch body 112, respectively. This recess 1
30 includes the circulation cam grooves 20 and 22 described in the first embodiment.
are formed, and the trace portions 24 and 26 of the trace member 14
is inserted into the circulation cam grooves 20, 22 and circulates within the circulation cam grooves 20, 22 while contacting the groove wall surfaces of the circulation cam grooves. In this embodiment, the wall surface 48 provided in the circulation cam groove 22 described in the first embodiment is not provided, and is replaced by the inner wall 110A of the housing 110, thereby reducing the size of the latch device.

Also, the trace member 1 on the opposite side of the trace parts 24 and 26
4 is swingably fixed to the inner wall of the housing 110.

As shown in FIG. 14, a protrusion 142 is formed protruding from the side surface of the latch body 112, and the housing 11
It enters into a guide slot 144 formed at 0.

As a result, the latch body 112 moves into the housing 11 by the protrusion 142 moving inside the guide elongated hole 144.
0, and the protrusion 142 is reciprocated relative to the guide slot 14.
4, the compression coil spring 12
Movement in the extraction direction is prevented against the urging force of No. 2.

As shown in FIG. 13, a pair of arms 1 are provided on the opposite side of the latch body 112 from the insertion portion into the housing 110.
46 and 148 are provided, and their tips are in an enlarged diameter state and spaced apart from each other. Between these arms 146 and 148 is a striker 1 attached to an opening/closing lid (not shown).
50 presses the center portion 147 of the arms 146 and 148 to move the latch body 112 into the housing 1.
It is designed to be pushed into 10.

Next, the operation of this embodiment will be explained.

Before the latch body 112 is pressed by the enlarged diameter portion 150A of the striker 150 (see FIG. 13), the protrusion 142 formed on the latch body 112 is locked in one end of the guide elongated hole 144 (see FIG. 14). ), latch body 112
is prevented from being removed and moved. At this time, as shown in FIG. 13, the arms 146 and 148 are in an open state, and the trace parts 24 and 26 of the trace member 14 are
It is located at the tip 137 of the latch body 112.

From the state shown in FIG. 15, arm 1 is
46, 148 and press the center part 147 of the latch body 11.
2 into the housing 110, the arm 146,
The outside of 148 hits the rectangular frame 14, and the hinges 146A, 1
Arms 146 and 148 rotate toward each other using 48A as a fulcrum. As a result, the enlarged diameter portion 150A of the striker 150 is held by the arms 146 and 148, and the opening/closing lid is closed.

At this time, the trace parts 24 and 26 of the trace member 14 are guided along the groove wall surfaces of the circulation cam grooves 20 and 22, and engage with the recesses 36 and 46, respectively, to prevent the latch body 112 from being pulled out.

Note that the effects of the tracing member 14 and the circulation cam grooves 20 and 22 are the same as those in the first embodiment, so a description thereof will be omitted.

Further, in this embodiment, the circulating cam grooves 20 and 22 were not provided with a stepped portion, but conventional circulating cam grooves having stepped portions were provided on both sides of the latch body 112, and the tracing member 14 of this embodiment was used to form the grooves. You can also trace inside. However, in order to obtain a thin latch device, it is more preferable not to provide a stepped portion in the circulation cam groove.

Further, in this embodiment, the tip side surface of the tracing member 14 is used as the tracing portion, but if the circulation cam groove is molded from a hard material, the inside of the circulation cam groove may be traced with the tip surface of the tracing member 14. good.

〔Effect of the invention〕

As explained above, in the locking mechanism according to the present invention, the groove wall surface of the circulation cam groove is traced by the circumferential side surface of the tip of the tracing member, so that the bottom surface of the circulation cam groove does not wear out, and Since there is no need to provide a biasing means, the number of parts can be reduced.

Further, since tracing in the direction opposite to the circulation direction is prevented by utilizing the twist of the tracing member, there is no need to form a step in the circulation cam groove, and the overall structure can be made thin.

Furthermore, since the tracing member is prevented from being pulled out at two locations in the circulation cam groove, the support strength is large and the breaking strength of the locking mechanism can be increased.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a locking mechanism according to a first embodiment of the present invention, FIG. 2 is a schematic diagram showing a push-type ashtray equipped with a locking mechanism according to a first embodiment of the present invention, and FIG. 11 are plan views showing one cycle of operation of the circulating cam groove and tracing member of the locking mechanism according to the first embodiment of the present invention, and FIG. 12 is a plan view according to the second embodiment of the present invention. FIG. 13 is an overall perspective view of a latch device according to a third embodiment of the present invention, and FIG. 14 is a partially broken side view of a latch device according to a third embodiment of the present invention. Perspective view,
FIG. 15 is a sectional view taken along the line 15-15 in FIG. 13 showing a latch device according to a third embodiment of the present invention, and FIG. 16 shows a circulating cam groove and tracing member of a conventional locking mechanism. The plan view and FIG. 17 are partial cross-sectional views of a conventional locking mechanism. 20, 22... Circulation cam groove, 14, 60... Trace member, 24, 26, 66, 68... Trace portion (trace member)
. 110... Housing, 112... Latch body, Agent Patent attorney Jun Nakajima Patent attorney Kato Kazusho Patent attorney Hiroyuki Iida

Claims (2)

[Claims] 1. A locking mechanism comprising a first locking member and a second locking member having a function of holding or releasing a closed state or housed state of a lid, a box, etc., wherein the first locking member a pair of circulation cam grooves formed in different groove shapes in different parts of the member; and the second circulation cam groove.
When inserted into the circulation cam groove while maintaining a non-contact state with the groove bottom surface of the circulation cam groove, the locking member is pressed from the groove wall surface of the circulation cam groove by relative movement with the first locking means. and a tracing means that circulates in the circulation direction in the circulation cam groove by a restoring force in the circulation direction of the torsional force generated by this pressing and alternately maintains an engaged state or a non-engaged state with the circulation cam groove. Has a locking mechanism. 2. A housing fixed to a mounting plate or the like, a latch body inserted into the housing and biased in the extraction direction, and a circulation cam groove formed in the latch body.
A latch device comprising: a trace member that circulates within the circulation cam groove each time the latch body is pushed in and maintains the latch body being pushed into the housing and pulled out alternately; A latch device in which the trace member is constituted by the locking mechanism according to claim (1).