JP6708885B2 - Operating mechanism and manufacturing method of operating mechanism - Google Patents

Description

The present invention relates to an operating mechanism and a method for manufacturing the operating mechanism.

2. Description of the Related Art Conventionally, there has been known an operation knob device for a cooking device or the like, in which a knob arranged in an opening of an operation panel is configured to be pushed and protruded from the operation panel by a push-push mechanism. When the heat source is not used, the knob can be pushed in, and when the heat source is used, the knob can be projected and rotated to adjust the heating power.

Patent Document 1 discloses, for example, an operation knob device including the push-push mechanism. In the operation knob device of Patent Document 1, a spring is interposed between the operation button 4 (hereinafter, referred to as an operation tube portion 4) and the fixing member 5 to allow the operation tube portion 4 to move back and forth with respect to the fixing member 5. I am configuring. More specifically, when the knob 4a is pushed from the retracted position (FIG. 2 of Patent Document 1) in which the front surface of the operation tube portion 4 and the knob 4a connected thereto are substantially flush with the front surface of the operation panel 2, a push-push mechanism is provided. The engagement between the first locking portion A provided in the cam groove and the operating pin 7a is released, and the operating pin 7a moves along the cam groove to be engaged with the second locking portion B (Patent Document 3) of FIG. 1), whereby the knob 4a is switched to the forward position where it projects from the operation panel 2.

Japanese Utility Model Publication No. 3-18982

By the way, in the operation knob device described in Patent Document 1, a long groove 8 extending in the axial direction is provided in the fixing member 5 on the opposite side across the central shaft with respect to one side of the fixing member 5 in which the operating pin 7a is arranged. A locking pin 9 that engages with the long groove 8 is provided in the operating cylinder portion 4 (FIGS. 2 and 3 of Patent Document 1). According to Patent Document 1, when the operating cylinder portion 4 moves to the forward position, as shown in FIG. 3 of Patent Document 1, the locking pin 9 engages with one end side of the long groove 8 extending in the axial direction. It is said that it is possible to suppress the operation tubular portion 4 and the fixing member 5 from being separated from each other.

However, although the axial movement of the operation tube portion 4 can be fixed by the engagement of the locking pin 9 and the long groove 8 described in Patent Document 1, the operation tube portion 4 with respect to the fixing member 5 and the operation tube portion 4 are connected thereto. There is a problem that rattling of the knob 4a occurs.

In order to suppress the rattling, for example, the fixing member 5 of Patent Document 1 is provided with a rib extending in the axial direction of the outer peripheral surface of the fixing member 5, and a concave portion for slidably guiding the rib is provided in the operating cylinder. There is also an idea of forming it on the inner peripheral surface of the portion 4. With this configuration, the rib is guided along the inside of the recess formed in the inner peripheral surface of the operation tube portion, and the push-push mechanism can move the operation tube portion and the knob connected thereto in the front-rear direction. Therefore, it is possible to suppress rattling to a certain extent as compared with the configuration described in Patent Document 1. However, even if such ribs and recesses are provided, it is necessary to provide a slight gap between them in terms of manufacturing. Therefore, in particular, when the front surface of the knob is moved to the forward position where it projects from the operation panel ( That is, in the state shown in FIG. 3 of Patent Document 1), there is a risk of rattling of the operating cylinder and the knob due to the gap. Depending on the degree of rattling, the gap between the operation panel and the operation panel may be partially eliminated during operation, and a further problem may occur in that noise is generated by rubbing, which may reduce the manufacturing yield.

Therefore, it is an object of the present invention to provide a technique capable of suppressing rattling of the operation unit when the front surface of the operation unit moves to a position protruding from the operation panel without deteriorating the yield.

An operation mechanism according to an aspect of the present invention includes a rear position in which an operation panel having an opening on a front surface and a front surface of an operation unit are substantially flush with each other, and the operation unit protrudes forward of the operation panel through the opening. An operating mechanism that is provided in an operating device that is displaceable between a front position and a first position that is connected to an axial rear side of the operating portion and has at least one end open, A cylindrical second case portion that is housed in the first case portion and that is provided slidably in the axial direction with respect to the first case portion; and the first case portion that is axial with respect to the second case portion. An elastic member for urging in the direction, and a concave portion is formed on one of the outer peripheral surface of the second case portion and the inner peripheral surface of the first case portion, and a convex portion that moves in the concave portion is formed on the other side. Provided so as to extend in a direction, and the convex portion and the concave portion each have an inclined surface in which a width in a direction orthogonal to the extending direction becomes wider toward the front side in the axial direction. The inclined surface of the convex portion abuts the inclined surface of the concave portion when in the front position.

According to this aspect, since the inclined surface of the convex portion of the second case portion abuts the inclined surface of the concave portion of the first case portion when the operation portion (knob) is at the front position, both (the first case portion). And rattling between the second case portion) can be suppressed. By suppressing the rattling, it is possible to obtain a good operation feeling when turning the operation portion, and it is possible to prevent the high-class feeling of the operation device from being impaired. Further, when the operating portion is in the front position, the inclined surface of the convex portion and the inclined surface of the concave portion contact each other, so that the operating portion is separated when the operating portion moves from the rear position to the front position (in other words, Separation of the first case part from the two case parts) can be suppressed. As a result, an elastic member having a larger elastic coefficient can be incorporated, so that the operation feeling when the operation portion is pushed can be made heavy, and the operation feeling can be improved.

According to the present invention, it is possible to provide a technique capable of suppressing rattling of the operation unit when the front surface of the operation unit moves to a position protruding from the operation panel without deteriorating the yield.

It is an external view which shows an example which mounted the operating mechanism which concerns on this embodiment in the heating cooker. It is a perspective view showing an operation knob device included in an operation mechanism concerning this embodiment. It is a perspective view showing the composition of the operating mechanism concerning this embodiment. It is a top view which shows the structure of the operating mechanism which concerns on this embodiment. It is sectional drawing which shows the IV-IV cross section of FIG. It is the figure which looked at the operation mechanism concerning this embodiment from the cover member side. It is an exploded perspective view of the operation mechanism concerning this embodiment. It is a perspective view which shows the structure of the pipe plunger of FIG. It is a side view of the pipe plunger seen from the A direction of FIG. It is sectional drawing which shows the VV cross section of FIG. It is a perspective view which shows the structure of the flange core of FIG. It is a side view of the flange core seen from the C direction of FIG. It is a side view of the flange core seen from the D direction of FIG. FIG. 7 is a cross-sectional view of a main part for explaining a rear position and a front position of the operation unit. It is a disassembled perspective view of the operation mechanism which concerns on a modification.

Embodiments of the present invention will be described below with reference to the accompanying drawings. For convenience of description, front, rear, left, right, and up and down are based on those shown in FIGS. In each of the drawings, the components denoted by the same reference numerals have the same or similar configurations.

FIG. 1 is an external view showing an example in which the operating mechanism according to the present embodiment is mounted on a heating cooker. FIG. 2 is a perspective view showing the configuration of the operation knob device.

As shown in FIG. 1, an operation panel 110 is provided on the front surface of the heating cooker 100. The operation panel 110 is provided with a plurality of openings 110a for inserting the operation knob device 1. The knob 10 (operation section) of the operation knob device 1 is arranged inside the opening 110a.

As shown in FIGS. 1 and 2, the knob 10 is mounted so as to be able to be pushed in and protruded from the operation panel 110 by a two-time pressing engagement/disengagement mechanism also called a push-push mechanism. When the heating cooker 100 shown in FIG. 1 is not used, the knob 10 is pushed in from the operation panel 110 by a push operation, and when the heating cooker 100 is used, the knob 10 is pushed out by a push operation and then rotated to generate heating power. Can be adjusted.

Although FIG. 1 shows an example in which the operation knob device 1 is mounted on the heating cooker 100, the present invention is not limited to this example, and can be appropriately mounted on other devices such as a gas appliance and a microwave oven, for example. .

As shown in FIG. 2, a pipe plunger 21 and a flange core 22 included in the push-push mechanism are arranged between the knob 10 and the rotary operation shaft 40a connected to the encoder 40. ..

The pipe plunger 21 is fitted and fixed to the tubular portion 10a (FIG. 2) of the knob 10. The rear side of the flange core 22 that loosely fits inside the pipe plunger 21 is fitted and fixed to the tip of the operation shaft 40a (FIG. 2). Since the operation shaft 40a and the flange core 22 connected thereto are fixed in the axial direction, the pipe plunger 21 slidably fitted to the flange core 22 and the knob 10 connected thereto. Is configured to be able to move forward in the axial direction by the urging force of the spring 23. Details of the rear position and the front position where the knob 10 moves will be described later.

The configuration of the operating mechanism for driving the knob 10 in the axial direction will be described. FIG. 3 is a perspective view showing a configuration of an operation mechanism included in the operation knob device of FIG. FIG. 4 is a top view of an operation mechanism included in the operation knob device of FIG. FIG. 5 is a cross-sectional view showing the IV-IV cross section of FIG. 4. FIG. 6 is a view of the operating mechanism included in the operating knob device of FIG. 2 as viewed from the front side in the axial direction. FIG. 7 is an exploded perspective view of an operation mechanism included in the operation knob device of FIG. FIG. 8 is a perspective view showing the structure of the pipe plunger of FIG. 7. FIG. 9 is a side view of the pipe plunger viewed from the direction A in FIG. FIG. 10 is a cross-sectional view showing a VV cross section of FIG. 9. FIG. 11 is a perspective view showing the structure of the flange core of FIG. 7. FIG. 12 is a side view of the flange core viewed from the direction C of FIG. 11. FIG. 13 is a side view of the flange core viewed from the direction D in FIG. 11.

As shown in FIG. 3, the operating mechanism 20 includes a pipe plunger 21, a flange core 22, a spring 23, a cover member 24, and a lock pin 25.

The pipe plunger 21 is made of, for example, a synthetic resin material, and has a tubular main body 21a having a shape in which both ends in the axial direction are open. As shown in FIG. 8, the tubular main body 21a includes a top surface portion 21c, a side surface portion 21d, and a connecting surface portion 21e that connects the top surface portion 21c and the side surface portion 21d and the side surface portions 21d. It has a cylindrical shape.

The upper surface portion 21c is a member which is located on the upper surface of the pipe plunger 21 and which is formed in a substantially flat plate shape. The upper surface portion 21c has a protruding portion 21c1 that protrudes axially forward from the end portion 21a1 of the tubular main body 21a. A fulcrum hole Ha (FIGS. 4, 5 and the like) into which the tip 25a of the lock pin 25 is inserted is formed at the axially front end of the protrusion 21c1. A portion of the protrusion 21c1 located on the front side in the axial direction (in other words, the vicinity of the portion of the protrusion 21c1 where the fulcrum hole Ha is formed) is fitted into a through hole 24c (FIG. 6) of the cover member 24 described later. Fixed together

The side surface portion 21d is a member that is located on the side surface of the pipe plunger 21 and that is formed in a substantially flat plate shape. The side surface portion 21d extends from the axial front side of the pipe plunger 21 to the rear side thereof. A portion of the side surface portion 21d on the front side in the axial direction protrudes from the end portion 21a1 (FIG. 8) of the cylindrical main body 21a, and a locking portion 21d1 that engages with the cover member 24 is provided at the tip of the protruding portion. It is provided. The locking portion 21d1 has a shape bent inward in the radial direction so as to be locked by grooved locked portions 24d1 formed on both left and right ends of the bottom plate 24a of the cover member 24.

The cover member 24 that fits together with the projecting portion 21c1 and the locking portion 21d1 of the pipe plunger 21 is assembled so as to cover the opening of the pipe plunger 21 on the front side in the axial direction. The cover member 24 is made of, for example, a synthetic resin material, and has a rectangular box shape having at least one open surface. The cover member 24 includes a bottom plate 24a and side plates 24b. The side plate 24b is formed with an axially extending concave guide groove 24d (FIG. 7) that guides the protruding portion of the side surface portion 21d of the pipe plunger 21 described above. The bottom plate 24a has a through hole 24c (FIG. 6) into which the above-mentioned protrusion 21c1 is fitted and a locked portion 24d1 (FIGS. 6 and 7) engaged with the locking portion 21d1 of the pipe plunger 21. Has been formed. The guide groove 24d and the locked portion 24d1 are formed so as to be connected so that the protruding portion 21c1 of the pipe plunger 21 is guided by the locked portion 24d1 along the guide groove 24d. When the cover member 24 is assembled to the front side of the pipe plunger 21 in the axial direction, the portion of the side surface portion 21d that protrudes to the front side in the axial direction is guided by the guide groove 24d of the cover member 24, and the locking portion 21d1 of the side surface portion 21d. Is locked and fixed to the locked portion 24d1 of the cover member 24. The bottom plate 24a is provided with a spring guide protrusion 24e standing upright in the center thereof. The spring 23 is placed with one end thereof being inserted into the spring guide protrusion 24e. As will be described later, the spring 23 is pressed and held between the bottom plate 24a and a support plate 22m (FIG. 5) located inside the flange core 22 described later.

A concave groove G (recess) that guides the rib R of the flange core 22 is formed on the inner peripheral surface of the pipe plunger 21. A plurality of grooves G are provided at a predetermined interval in the circumferential direction of the inner peripheral surface of the pipe plunger 21.

The groove G is provided so as to extend from one end to the other end in the axial direction of the cylindrical main body 21a whose both ends in the axial direction are open. As shown in FIG. 9, the groove G has a side view concave shape including a bottom wall surface Gd and a pair of side wall surfaces (Ga, Gb, Gc).

The bottom wall surface Gd has a planar shape that is substantially parallel to the axial direction of the pipe plunger 21. The side wall surface Ga, the side wall surface Gb, and the side wall surface Gc are provided in this order from the front side in the axial direction. The side wall surface Ga and the side wall surface Gc have a planar shape that extends substantially parallel to the axial direction. The side wall surface Gb connecting the side wall surface Ga and the side wall surface Gc constitutes an inclined surface (tapered surface) inclined by a predetermined angle with respect to the axial direction. As shown in FIG. 10, the side wall surface Gb is inclined so that the width in the direction orthogonal to the extending direction of the groove G becomes wider as it goes toward the front side in the axial direction (as it goes toward the right side in FIG. 10 ). There is. Since such a side wall surface Gb is formed, the width of the groove G located on the front side in the axial direction (D2 shown in FIG. 10) of the groove G is the width of the groove G located on the rear side in the axial direction (FIG. It is larger than D1) shown in 10.

In the present embodiment, as shown in FIG. 10, the axial length of the side wall surface Ga is longer than the axial length of the side wall surface Gb, and the axial length of the side wall surface Gb is the axial direction of the side wall surface Gc. Longer than. That is, the side wall surface Gb is arranged at a position on the axial rear side in the groove G formed on the inner peripheral surface of the pipe plunger 21. As will be described later, when the knob 10 moves from the rear position to the front position, the side wall surface Gb of the groove G (hereinafter, also referred to as an inclined surface Gb) is a side surface Rb of the rib R of the flange core 22 (hereinafter, the inclined surface). (Also referred to as Rb).

The angle between the inclined surfaces Gb of the groove G (angle θ1 shown in FIG. 10) may be in the range of 0.5° to 90° (in other words, the inclination angle of the inclined surface Gb is the pipe plunger 21). The angle may be in the range of 0.25° to 45° with respect to the axis AX direction). The angle θ1 is preferably 2° or more and 60° or less.

In addition, in this embodiment, the groove G is provided at three locations along the circumferential direction of the inner peripheral surface of the pipe plunger 21, but the number is not limited to this example, and the number thereof can be appropriately changed. Further, the side wall surface of the groove G in the present embodiment is not limited to the illustrated shape (side wall surface Ga, side wall surface Gb, side wall surface Gc) as long as the side wall surface of the groove G has an inclined portion, and can be appropriately changed. ..

Further, in the present embodiment, in addition to the groove G described above being formed on the inner peripheral surface of the pipe plunger 21, the groove Gs is formed. The groove Gs has a concave shape that is recessed from the inner peripheral surface of the pipe plunger 21, and has a shape different from that of the groove G. The groove Gs is formed so as to guide the rib Rs of the flange core 22 similarly to the groove G described above.

In addition, the central portion of the groove G′ located on the lower side of each groove G is provided at a position deviated from the central axis C1 extending in the vertical direction (vertical direction) through the axis AX. That is, the groove G′ is provided at a position slightly deviated from the central axis C1 in the left-right direction when the pipe plunger 21 is viewed from the axial front side or the axial rear side. In FIG. 9, when the pipe plunger 21 is viewed from the front side in the axial direction, the groove G′ is provided at a position deviated to the left from the central axis C1, and the groove Gs described above is located on the right side of the central axis C1 ( Although it is provided on the side opposite to the position where the groove G'is provided with the central axis C1 sandwiched therebetween, the groove may be formed as shown by the broken line in FIG.

Specifically, when the pipe plunger 21 is viewed from the front side in the axial direction, a groove G′ shown by a broken line in FIG. 9 is provided at a position displaced to the right from the central axis C1, and the groove Gs is arranged from the central axis C1. It may be provided at a position displaced to the left. Ribs R′ and Rs (ribs R′ and Rs shown by broken lines in FIG. 12) of the flange core 22 described later may be provided so as to correspond to the grooves G′ and Gs provided at such positions. In this way, by molding the pipe plunger 21 in which the positions of the grooves G′ and Gs are different and the flange core 22 in which the positions of the ribs R′ and Rs are different, molding of each groove and rib is the same position. The following effects are achieved as compared with the case of manufacturing a product. That is, when a plurality of pipe plungers and flange cores in which all grooves and ribs guided by these are all in the same position are molded using a predetermined mold (not shown), they are molded using the predetermined mold. In each molded product (pipe plunger and flange core), a dimensional error may occur in the formation position of each groove and the rib guided thereby. Therefore, if the molded products having the maximum dimensional error with each other are combined, defective products may occur.

On the other hand, in the present embodiment, as described above, the pipe plunger 21 in which the positions of the grooves G′ and Gs are different and the flange core 22 in which the positions of the ribs R′ and Rs guided by these are different. Is molded using a predetermined mold. That is, using the predetermined mold, a pipe plunger 21 having grooves G′ and Gs shown by solid lines in FIG. 9 and a flange core 22 having ribs R′ and Rs shown by solid lines in FIG. The pipe plunger 21 having the grooves G′ and Gs shown by broken lines in FIG. 9 and the flange core 22 having the ribs R′ and Rs shown by broken lines in FIG. 12 are combined. As a result, the dimensional error that occurs in the combination of the respective molded products (the pipe plunger 21 and the flange core 22) is the same as the dimensional error that occurs when manufacturing the molded product in which all the grooves and ribs are at the same position. It can be suppressed in comparison. As a result, the reliability of the manufactured product can be improved.

The manufacturing process of the pipe plunger 21 and the flange core 22 described above with reference to FIGS. 9 and 12 includes the following processes. That is, the rib R′ and the groove G′ have a rib Rs (sub-convex portion) and a groove Gs (sub-concave portion) provided substantially parallel to each other, and the rib R′ and the groove G′ are relative to the rib Rs and the groove Gs. It includes a step of preparing a predetermined mold having a plurality of cavities whose positions are changed, and using the mold, forming a pipe plunger 21 and a flange core 22 corresponding to each mold. It is possible to limit the combination of the pipe plunger 21 and the flange core 22 by obtaining the pipe plunger 21 and the flange core 22 corresponding to each using a predetermined mold having such a plurality of cavities. ..

In the present embodiment described above, an example of two combinations of the pipe plunger 21 and the flange core 22 (in FIGS. 9 and 12, grooves G′ and Gs indicated by solid lines and ribs R′ and Rs guided by these, Although the grooves G′ and Gs indicated by broken lines and the ribs R′ and Rs guided by these are described, the grooves and the ribs may be formed based on a combination of three or more. As a result, the maximum combination error due to the dimensional error between individual differences can be further suppressed, and the reliability of the product can be further improved.

The flange core 22 is made of, for example, a synthetic resin material, and is housed in the pipe plunger 21 such that a part of the flange core 22 projects from the opening of the pipe plunger 21. The flange core 22 is open at both ends in the axial direction, and has a substantially cylindrical shape including a substantially flat plate-shaped upper surface 22a and a pair of side surfaces 22b, and a substantially arc-shaped bottom surface 22c. A heart-shaped cam groove M is provided on the upper surface 22a, and ribs R are provided on the pair of side surfaces 22b and the bottom surface 22c. As shown in FIG. 12, a rib Rs is provided at the lower end of the side surface 22b so as to project downward from the bottom surface 22c formed of an arcuate curved surface.

The ribs R and Rs are provided so as to be movable in the groove G of the pipe plunger 21 and extend along the axial direction of the outer peripheral surface of the flange core 22. As described above, the three ribs R having substantially the same shape slide in the groove G of the pipe plunger 21, and the rib Rs slides in the groove Gs of the pipe plunger 21.

The rib R has a side view convex shape including a top surface Rd and a pair of side surfaces (Ra, Rb, Rc). As shown in FIG. 12, the top surface Rd has a planar shape that is substantially parallel to the axial direction of the flange core 22. The side surface Ra, the side surface Rb, and the side surface Rc are arranged in this order from the front side in the axial direction. As shown in FIG. 13, the side surface Ra and the side surface Rc have a planar shape extending in parallel to the axial direction. The side surface Rb connecting the side surface Ra and the side surface Rc constitutes an inclined surface (tapered surface) inclined by a predetermined angle with respect to the axial direction. As shown in FIG. 13, the side surface Rb is inclined so that the width in the direction orthogonal to the extending direction of the rib R becomes wider toward the front side in the axial direction. Since such a side surface Rb is formed, the width of the portion of the rib R located on the axial front side (D4 shown in FIG. 13) is the width of the portion of the rib R located on the axial rear side ( It is larger than D3) shown in FIG.

The angle formed by the side surfaces Rb (slopes) of the rib R (angle θ2 shown in FIG. 13) may be in the range of 0.5° to 90° (in other words, the slope angle of the slope Rb is the flange. It may be in the range of 0.25° to 45° with respect to the axis AX direction of the core 22). The angle θ2 is preferably 2° or more and 60° or less. The angles θ1 and θ2 do not necessarily have to be the same, and by making the angle θ2 slightly larger than the angle θ1, the rib R of the groove G fits in a wedge shape and the flange core 22 and the pipe plunger 21 are It is possible to further suppress rattling (in other words, rattling of the knob 10 connected to the pipe plunger 21).

The width D3 of the portion of the rib R located on the axial rear side is located on the axial rear side of the groove G so that the rib R is slidably guided along the groove G. It is set smaller than the width D1 of the portion. Further, the axial length of the side surface Rc is longer than the axial length of the side surface Rb, the axial length of the side surface Rb is longer than the axial length of the side surface Ra, and the side surface Rb is the rib R. Is located at the front side in the axial direction.

In the embodiment described above, the side surface of the rib R having the convex shape includes the side surface Ra, the side surface Rb, and the side surface Rc described above, but is not limited to the side surface shape shown in the drawing. That is, the rib R of the present embodiment has only to have an inclined surface inclined by a predetermined angle with respect to the axial direction (the direction of the axis AX shown in FIG. 13), and can be appropriately changed to other shapes.

Further, in the embodiment described above, three ribs R having substantially the same shape and one rib Rs having a shape different from the rib R are provided on the outer peripheral surface of the flange core 22, but the invention is not limited to this aspect. The number thereof can also be changed appropriately. From the viewpoint of further suppressing rattling of the pipe plunger 21 with respect to the flange core 22, at least three ribs R are provided at predetermined intervals in the circumferential direction of the outer peripheral surface of the flange core 22, and the rib R is slid. It is preferable to provide at least three grooves G for movably guiding the inner circumferential surface of the pipe plunger 21 at predetermined intervals in the circumferential direction.

Subsequently, a method of assembling the operation mechanism 20 having the above-described configuration will be described with reference to an exploded perspective view shown in FIG. 7.

First, a pipe plunger 21 having both axial ends opened is prepared, and a flange core 22 which can be accommodated inside the pipe plunger 21 through the opening of the pipe plunger 21 is prepared.

Next, the flange core 22 is housed inside the pipe plunger 21 from the opening on the front side in the axial direction of the pipe plunger 21. As described above, the groove G formed on the inner peripheral surface of the pipe plunger 21 has the side wall surface Gb (inclined surface), and the rib R of the flange core 22 sliding in the groove G also has the side surface Rb (inclined surface). Since it has a surface, the flange core 22 can be housed in the pipe plunger 21 only from the axial front side of the pipe plunger 21.

Next, the spring 23 and the cover member 24 are assembled from the front side of the flange core 22 in the axial direction. As described above, since it is necessary to assemble the flange core 22 from the axial front side of the pipe plunger 21, both axial ends of the pipe plunger 21 are open. On the other hand, in order to urge the pipe plunger 21 toward the front side in the axial direction with respect to the flange core 22 by the urging force of the spring 23, it is necessary to cover the opening at the front side in the axial direction of the pipe plunger 21. Therefore, the cover member 24 is connected to the front side of the pipe plunger 21 in the axial direction, and the spring 23 is axially pressed and held between the cover member 24 and the flange core 22.

By the way, regarding the spring 23 pressed and held in the pipe plunger 21 and the cover member 24, when incorporating the spring 23 having a larger elastic coefficient, it is necessary to firmly fix the pipe plunger 21 and the cover member 24.

Therefore, in the present embodiment, in the state where the spring 23 is pressed and held between the support plate 22m (FIG. 5) in the flange core 22 and the bottom plate 24a of the cover member 24, the locking portion 21d1 of the pipe plunger 21 (see FIG. 6). And 7) are fixed to the locked portion 24d1 of the cover member 24. Accordingly, the pipe plunger 21 and the cover member 24 can be firmly fixed, and the spring 23 can integrally bias the pipe plunger 21 and the cover member 24 to the front side in the axial direction. Further, in the present embodiment, the tip end of the flat plate-shaped protruding portion 21c1 of the pipe plunger 21 is fitted into the through hole 24c of the cover member 24. As described below, one end is inserted into a fulcrum hole Ha (a hole formed in the protruding portion 21c1) formed at the axially front end of the pipe plunger 21, and the other end of the flange core 22 is inserted. A lock pin 25 guided along the cam groove M is assembled, and the lock pin 25 is locked to a predetermined locking portion of the cam groove M (for example, points a and c of the cam groove M). With the fulcrum hole Ha into which the lock pin 25 is inserted being formed, the axially forward end of the pipe plunger 21 (the tip of the protruding portion 21c1) is inserted into the through hole 24c of the cover member 24. The pipe plunger 21 and the cover member 24 are fixed.

Next, one end 25a of the lock pin 25 whose both ends are bent is inserted into the fulcrum hole Ha of the pipe plunger 21, and the other end 25b of the lock pin 25 is inserted into the cam groove M of the heart cam of the flange core 22. The other end 25b of the lock pin 25 is guided along the cam groove M of the heart cam of the flange core 22. Note that the one end 25a of the lock pin 25 is not limited to the mode in which it is inserted into the fulcrum hole Ha provided in the pipe plunger 21, and as shown in FIG. 15, for example, the fulcrum hole Ha' provided in the cover member 24' is provided. You may make it plug in. In the mode shown in FIG. 15, one end 25a of the lock pin 25 is inserted into a fulcrum hole Ha′ provided in the cover member 24′, and the other end 25b of the lock pin 25 is guided along the cam groove M of the flange core 22. Then, the lock pin 25 is locked to a predetermined locking portion of the cam groove M (for example, points a and c of the cam groove M), so that the knob 10 is held at a rear position or a front position described later. It should be noted that the pipe plunger 21' of the operating mechanism 20' shown in FIG. 15 is not provided with the protrusion 21c1 of the pipe plunger 21 shown in FIG. 7, and the cover member 24' shown in FIG. The through hole 24c of the cover member 24 shown in 5 is not provided.

As shown in FIG. 7, the cam groove M has four turning points a, b, c, d, and each turning point is provided with a downward step in the lock pin moving direction. An end 25b of the lock pin 25 is detented. When the end 25b of the lock pin 25 is at the point a of the cam groove M, the flange core 22 is pushed by the spring 23. However, since the flange core 22 is fixed to the operation shaft 40a (FIG. 2) which does not move, the pipe plunger 21 and the knob 10 integrated with the pipe plunger 21 are extruded in the opposite direction (that is, the knob 10 is the operation panel 110). (Protruding from). When the knob 10 is pushed here, the end 25b of the lock pin 25 moves to the point d in FIG. 7, and when the pushing is stopped, it returns by the distance K and is locked at the point c, and the knob 10 is stored in the instrument body. It will be in the state of being. When the knob 10 is pushed again in this state, the end 25b of the lock pin 25 moves by the distance K to reach the point b in FIG. 7, and when released, it returns to the point a and returns to the protruding state. In this way, the push-push operation is performed by driving the lock pin 25 guided along the cam groove M of the heart cam.

Next, the push-push operation will be described. FIG. 14A is a cross-sectional view of an essential part for explaining a rear position where the front surface of the knob 10 is substantially flush with the operation panel 110. FIG. 14B is a cross-sectional view of an essential part for explaining the front position in which the knob 10 projects forward through the opening to the front side of the operation panel 110.

The pipe plunger 21 and the knob 10 connected to the pipe plunger 21 are configured to be movable to a rear position and a front position by a push operation.

As shown in FIG. 14(A), the rear position means that the other end 25b of the lock pin 25 remains locked while the one end 25a of the lock pin 25 whose both ends are bent is locked in the fulcrum hole Ha of the pipe plunger 21. The front surface of the knob 10 is substantially flush with the operation panel 110 by being locked and held at the point c provided in the heart-shaped cam groove M of the push-push mechanism. When the knob 10 is pushed from this state, the engagement between the other end 25b of the lock pin 25 and the point c provided in the cam groove M is released, and the other end 25b of the lock pin 25 moves along the cam groove M. , And is in the state of being located at the point a provided in the cam groove M. As a result, the knob 10 can be switched to the following front position that projects from the operation panel 110.

As shown in FIG. 14(B), the front position means that the one end 25a of the lock pin 25 whose both ends are bent is locked to the fulcrum hole Ha of the pipe plunger 21 while the other end 25b of the lock pin 25 is Since the push-push mechanism is located at the point a provided in the heart-shaped cam groove M, the front surface of the knob 10 projects forward of the operation panel 110. The flange core 22 is fixed to the operation shaft 40a connected to the encoder 40, as described above. The operation knob device 1 is rotatable in the front position (FIG. 14(B)), and when the knob 10 is operated to rotate, the flange core 22 rotates together with the pipe plunger 21, and the power is supplied to the instrument body via the operation shaft 40a. Can be supplied to adjust the heating power or the like.

By the way, when the rib of the flange core and the groove of the pipe plunger for slidably guiding the rib are formed to extend substantially parallel to the axial direction, rattling of the knob may occur. .. Specifically, when the knob is in the front position in which the knob protrudes to the front side of the operation panel, the gap between the rib and the groove guiding the rib rattles the pipe plunger and the knob connected to the pipe plunger. Sometimes. The rattling of the knob may impair the high-class feeling.

In the present embodiment, the rib R and the groove G have the above-described configuration in order to suppress rattling. That is, when the front surface of the knob 10 is moved from the rear position where the front surface of the knob 10 is substantially flush with the operation panel 110 to the front position which is biased by the spring 23 and the front surface of the knob 10 projects forward of the operation panel 110, The inclined surface Rb of the rib R of the flange core 22 is pressed against the inclined surface Gb of the groove G of the pipe plunger 21. In this way, since the inclined surface Rb of the rib R is pressed against the inclined surface Gb of the groove G by being biased by the spring 23, rattling of the knob 10 when the knob 10 is at the front position can be suppressed. .. As a result, it is possible to prevent the sense of quality from being impaired due to rattling of the knob 10.

In addition, with the configuration in which the inclined surface Rb of the rib R and the inclined surface Gb of the groove G are brought into pressure contact with each other, separation of the pipe plunger 21 from the flange core 22 can also be suppressed. As a result, the spring 23 having a larger elastic coefficient can be incorporated. As a result, the operation feeling when the knob 10 is pressed can be made heavy, and the operation feeling can be improved.

In the embodiment described above, the concave groove G that is recessed radially outward from the inner peripheral surface of the pipe plunger 21 and the convex rib R that protrudes radially outward from the outer peripheral surface of the flange core 22 are formed. However, it is not limited to this example. For example, a convex rib (projection) protruding radially inward from the inner peripheral surface of the pipe plunger 21 is provided, and the outer peripheral surface of the flange core 22 is radially inwardly guided so as to guide the rib slidably. Alternatively, a concave groove (recess) may be formed.

The embodiments described above are for facilitating the understanding of the present invention and are not for limiting the interpretation of the present invention. Each element included in the embodiment and its arrangement, material, condition, shape, size and the like are not limited to the exemplified ones and can be changed as appropriate. For example, in the present embodiment, the pipe plunger 21 has a shape in which both ends in the axial direction are open, but the flange core 22 and the pipe plunger 21 are combined in advance by using the pipe plunger 21 in which one end in the axial direction is open. It may be molded. Further, the configurations shown in different embodiments can be partially replaced or combined.

DESCRIPTION OF SYMBOLS 1... Operation knob device, 10... Knob, 20... Push-push mechanism (operation mechanism), 21... Pipe plunger (1st case part), 22... Flange core (2nd case part), 23... Spring, 24... Cover Members, 25... Lock pin (locking pin), 100... Heating cooker, 110... Operation panel, G... Recess, Gb... Inclined surface, R... Convex part, Rb... Inclined surface

Claims (8)

Operation displaceable between a rear position in which the operation panel having an opening on the front surface and the front surface of the operation portion are substantially coplanar with each other and a front position in which the operation portion projects forward from the operation panel through the opening. An operation mechanism provided in the device,
A tubular first case portion connected to the rear side in the axial direction of the operation portion and having at least one end opened;
A tubular second case portion housed in the first case portion and slidably provided in the axial direction with respect to the first case portion;
An elastic member for urging the first case portion in the axial direction with respect to the second case portion,
A concave portion is provided on one of the outer peripheral surface of the second case portion and the inner peripheral surface of the first case portion, and a convex portion that moves in the concave portion is provided on the other extending in the axial direction.
The convex portion and the concave portion each have an inclined surface in which the width in the direction orthogonal to the extending direction becomes wider as it goes toward the front side in the axial direction,
An operating mechanism, wherein the inclined surface of the convex portion abuts the inclined surface of the concave portion when the operating portion is in the front position. The concave portion is formed on the inner peripheral surface of the first case portion,
The convex portion is formed so as to project from the outer peripheral surface of the second case portion,
The operation mechanism according to claim 1. The concave portion and the convex portion are provided at least at three positions in the circumferential direction of the first case portion and the second case portion at predetermined intervals.
The operation mechanism according to claim 1. The inclination angle of the inclined surface of the convex portion is 0.25° or more and 45° or less with respect to the axial direction of the second case portion,
The operation mechanism according to any one of claims 1 to 3. Both ends of the first case portion in the axial direction are open,
A cover member for covering an axially front opening of the first case portion,
The cover member has a locked portion that engages with the locking portion of the first case portion and is fixed to the front side in the axial direction of the first case portion,
The elastic member is axially pressed and held by the second case portion and the cover member,
The operation mechanism according to any one of claims 1 to 4. One end is inserted into a hole located at the axially front end of the first case portion, and the other end has a locking pin guided along the cam groove of the second case portion,
By locking the locking pin to a predetermined locking portion of the cam groove, the operating portion is held at the rear position or the front position,
The first case portion and the cover member are fixed in a state where an end portion of the first case portion on the front side in the axial direction is inserted into a through hole of the cover member.
The operation mechanism according to claim 5. One end is inserted into a hole provided in the cover member, and the other end has a locking pin guided along the cam groove of the second case portion,
By locking the locking pin to a predetermined locking portion of the cam groove, the operation portion is held at the rear position or the front position.
The operation mechanism according to claim 5. A method for manufacturing an operating mechanism according to any one of claims 1 to 7, comprising:
A plurality of cavities having sub-projections and sub-recesses provided substantially parallel to the projections and the recesses, and changing relative positions of the projections and the recesses and the sub-projections and sub-recesses, respectively. A method of manufacturing an operating mechanism, including a step of forming the first case portion and the second case portion corresponding to each other using a mold having

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