KR100612562B1 - Opening/closing assembly and apparatus for doors - Google Patents

Abstract

(Problem) Improve the quality and reliability by eliminating the risk of damage or breakage of the rotary gear and its related members and gears.

(Solution means) In the door opening / closing mechanism which rotates the door body 3 to the closed position and the open position with respect to the box-shaped base body 2, the door body 3 protrudes and forms the support arm part 31, It has the arc-shaped gear part 37 formed in this arm part 31, and the rotary gear 7 attached to the substantially circular arc center of this gear part 37. As shown in FIG. The base 2 has an internal gear type first gear portion 28 formed so as to engage with the gear portion 37 and a second gear portion 9b that is elastically displaceable and engages with the rotary gear 7. have. Then, the door body 3 is connected to the first gear portion 28 through respective engagements of the gear portion 37 with respect to the first gear portion 28 and the rotary gear 7 with respect to the second gear portion 9b. The second gear portion 9b receives a load applied to the rotary gear 7 due to the load when the load is changed from the outside to the corresponding trajectory while being rotated to the corresponding trajectory. It can be absorbed by the elastic position displacement of.

Description

Door opening and closing mechanism and device {OPENING / CLOSING ASSEMBLY AND APPARATUS FOR DOORS}             

1 is a block diagram showing the decomposition of the box to which the present invention is applied.

FIG. 2 is a partial front view showing the box of FIG. 1 in the closed position of the door; FIG.

3 is a side view showing the box of FIG. 1 in the closed position of the door;

4 is a cross-sectional view taken along the line A-A of FIG.

Fig. 5 schematically shows a state in which the second gear portion is assembled to the gear cover of Fig. 1, (b) is a sectional view taken along the line B-B in (a), and (c) and (d) is a sectional view taken along the line C-C in (a).

6 is an operation diagram showing the box in the closed position of the door;

7 is an operation diagram showing the box in the open position of the door;

8 is an explanatory diagram showing a conventional door opening and closing mechanism and device;

Explanation of symbols on the main parts of the drawings

1-box (door opening and closing device) 2-box-shaped body (基 體)

3-door body 31-arm

34-LOCKERS 4-Locking means (push and push mechanism)

5-Tangier means 6-Damper means

7-Rotary gear 8b-Shaft part (guide means)

9-movable body 9a-movable body

9b-2nd gear part 9c-elastic part

10-Gear Cover 28-First Gear

29a-guide wall part (guide means) 37-arc-shaped gear part

The present invention relates to a door opening and closing mechanism for opening and closing a door body with respect to a box-shaped gas, and a door opening and closing device using the same. In addition, in this specification, a "box-shaped base body" contains various container, a housing | casing, etc., and a "door body" shows the thing of a wide meaning including a cover body, a shielding body, etc.

The conventional door opening / closing mechanism is configured to rotate the door body to the closed position and the open position with respect to the opening of the box-shaped gas through a rotation shaft or the like. The problem was that it got worse.

The door opening / closing mechanism and the device shown in FIG. 8 have been developed by the present applicant in order to solve the above problems (Patent Document 1).

As shown in FIG. 8, the door opening / closing mechanism holds the door body 3 in a closed position against the elastic force of the holding means 5 holding the door body 3 in the open position direction, and the holding means 5. Is employed in the box 1 as a door opening and closing device provided with a locking means 4 for releasable locking and a damper means 6 for braking.

Here, the box-shaped base body 2 is open at the upper surface side, and a flange portion 26 is formed along the periphery of the upper surface side opening, and both side wall portions 23 have the rear side wall portion 23a at the front side wall portion. It protrudes outward compared with 23b, and forms the window part which communicates inside and outside of the box-shaped base body 2 in the step surface between the rear side wall part 23a and the front side wall part 23b. The door body 3 has a support arm portion 31 disposed outwardly through the window portion inside the box-shaped base 2, and the damper means 6 is attached to the disc portion of the support arm portion 31 ( It is attached to the 32) side. The locking means 4 hangs and locks the engagement piece 34 of the door body 3 by the pressing operation, and the locking state is released again by the pressing operation. One end of the holding means 5 is fixed to the locking projection 29 of the box-shaped base 2 and the other end is fixed to the shaft portion 35 of the support arm 31.

The characteristic of the door opening / closing mechanism is an arc-shaped gear portion 37 formed in the support arm portion 31 of the door body 3 and the arc-shaped gear portion (as shown in enlarged view in Fig. 8B). 37 having a rotary gear 7 provided at the center of the arc of the arc, the rotary gear 7 constituting the damper means 6, and the box-shaped base 2 being provided on the rib 27 A first fixed gear portion 27a of an internal gear type, which is formed and engaged with the arc-shaped gear portion 37, and a second fixed portion formed inside the first fixed gear portion 27a and engaged with the rotary gear 7; It has a gear part 28, etc.

In the above door opening / closing mechanism, the door body 3 is held by engagement between the arc-shaped gear part 37, the first fixed gear part 27a, and the rotary gear 7 and the second fixed gear part 28. And a trajectory along the gear portion of the internal gear type of the first fixed gear portion 27a. Then, when the door body 3 is rotated from the closed position to the open position or from the open position to the closed position, the pivot support point of the door body 3 is an internal gear type gear portion of the first fixed gear portion 27a. By rotating to the lower side or the upper side corresponding to {and the gear portion of the second fixed gear portion 28}, the amount of protrusion in the box-shaped base 2 of the door body 3 in the open position can be suppressed, In the course of rotation switching, good operation due to the engagement of the gears together with braking of the damper means 6 can be obtained.

(Patent Document 1) Japanese Unexamined Patent Publication No. 2003-129742

In the above door opening / closing mechanism and the device, when the door receives the large load F from the upper side when the door is in the closed position, the load gear is engaged with the second fixed gear portion 28 on the box-shaped base side. If the gear is engaged with the gear and the support of the rotary gear 7 may be damaged, and the rotary gear 7 is mounted on the output shaft of the damper means 6, the oil filled in the damper body There is a risk of leakage. This problem is remarkable in the aspect which constitutes the door body 3 as an armrest, a simple table, etc. in addition to the case where an object is placed or dropped on the door body 3.                         

Accordingly, an object of the present invention is to solve the above problems, to eliminate the risk of damage or damage to the rotating gear and its related members and gears, to improve quality and reliability, and to avoid application restrictions. have. Other objects are apparent from the description below.

In the invention according to claim 1, the door opening and closing mechanism for turning the door body into a closed position for closing the opening of the base body and an opening position for opening the opening with respect to the box-shaped base body, wherein the door body has a supporting arm portion. A protruding, arcuate gear portion formed in the arm portion and a rotary gear attached to an approximately arcuate center of the gear portion, wherein the body is formed of an internal gear type first gear portion and an elastic position formed to engage the arcuate gear portion; A second gear portion which is installed to be displaceable and engages with the rotary gear, and the door body has the first gear through each engagement of an arc-shaped gear portion with respect to the first gear portion and a rotation gear with respect to the second gear portion; When rotation is switched to the trajectory corresponding to the negative part and when a load is applied from the outside to the bottom direction of the gas in the closed position, It is characterized in that the load applied to the rotary gear can be absorbed by the elastic position displacement of the second gear portion due to the heavy load. Here, "absorbable by elastic position displacement" means that the second gear portion is formed to elastically vary its installation location or position.

According to the door opening / closing mechanism described above, the door body is supported through engagement of an arc-shaped gear portion with respect to the first gear portion on the box-shaped base side and rotation gear with respect to the second gear portion, and from the closed position to the open position or the open position. When the rotational support point of the door body is rotated in correspondence with the inner gear type gear portion (and the gear portion of the second gear portion) of the first gear portion, when it is switched from the closed position to the closed position, the same advantages as those shown in FIG. In the open position, the protrusion amount in the box-shaped body of the door body is suppressed to improve the appearance characteristics, and in the process of rotation switching, there is an advantage of improving the operating characteristics by suppressing abrupt rotation by engaging the gears together. In addition, when the door body receives a load in the bottom direction of the box-shaped body from the outside in the closed position, it is applied to the rotary gear due to this load. Since the load can be absorbed by the elastic position displacement of the second gear portion engaged with the rotary gear, it is possible to reliably prevent damage to the engaging portion of the rotary gear and the second gear, the support portion of the rotary gear, and the like.

It is preferable that the door opening and closing mechanism has a gear cover attached to the base and supporting the second gear portion so as to be elastically displaceable (claim 2). Although the second gear portion may be elastically displaced in the box-shaped base, it is easier to attach it to the gear cover. Furthermore, as in the embodiment, the first gear unit on the box-shaped base side and the arc-shaped gear part on the door body side as in the embodiment. And the outer gear, that is, the gear mechanism part with the gear cover, can maintain appearance characteristics, operating characteristics and the like.

In this case, it is preferable that the said 2nd gear part is provided in the movable body which is slidably moved with respect to the said gear cover, and is supported by one direction (claim 3). This is because the second gear portion is provided in the gear cover via the movable body, so that, for example, the elastic support force of the second gear portion can be secured to an appropriate size or the slide movement support structure can be simplified.

The invention according to claim 4, wherein the door opening and closing mechanism is held as an apparatus, and the door body is rotated to a closed position for closing the opening of the box-shaped gas and to an open position for opening the opening, and held in the open position direction. A door opening / closing device comprising a finger holding means and a locking means and a rotary damper means, which are releasably hooked and fixed in the closed position to resist the elastic force of the finger holding means, wherein the door body is any one of claims 1 to 3. It is switched to the closed position and the open position by the door opening and closing mechanism described in the above, and the damper means attaches a damper body to the arm portion, and the rotary gear of the door opening and closing mechanism is attached to the output shaft of the damper body. Doing.

According to the above door opening and closing apparatus, in addition to the advantages of the door opening and closing mechanism, the door body is switched from the closed position to the open position by the elastic force of the holding means, or the door body is moved from the open position to the closed position against the elastic force. The operation at the time of switching can be made smooth by the damper means, and since the damper means is equipped with the rotary gear of the door opening / closing mechanism on the output shaft, the assembly can be simplified.

 The door opening and closing device includes an axial portion protruding on a bottom surface of the main body opposite to the output shaft in the damper main body of the damper means, and an arc-shaped guide protruding from the base and having a trajectory substantially the same as the first gear portion. It is made of a wall portion, it is preferable that the shaft portion has a guide means for sliding the slide along the guide wall in the process of turning the door (claim 5). This is because the door opening and closing device can more stably maintain the rotation switching operation of the door body by the guide means.

Embodiment of the Invention

Best Mode for Carrying Out the Invention The best embodiment of the present invention will be described with reference to the examples shown in the drawings. In addition, in FIG. 1-7, the same code | symbol is attached | subjected about the member similar or similar to the prior art of FIG. In the following description, after explaining the whole outline, a main part is made clear based on an Example.

(summary)

The door opening and closing apparatus of this embodiment has an example of a box 1 composed of a box body 2 and a door body 3 which opens and closes an upper surface side opening of the box body 2, and the door body 3 To the retentive means 5 which is held in the direction of the open position from the closed position, and the door body 3 to be releasably locked in a closed position that closes the upper side opening by resisting the elastic force of the touched means 5. And a locking means 4, a braking damper means 6, and a rotation guide means 8b, 29a. The door body 3 is rotated to an open position and a closed position by the door opening and closing mechanism of the present invention. Is switched.

In the door opening and closing mechanism, the door body 3 protrudes from the support arm portion 31, and is attached to the arc-shaped gear portion 37 formed in the arm portion 31 and approximately the center of the arc of the gear portion 37. A point having a rotary gear 7, a point where the rotary gear 7 shares a part of the damper means 6, and the box-shaped base 2 corresponds to the arm portion 31 at an upper surface side opening. The window portion 24 is formed so as to protrude to the outside of the side wall portion 23, the box-shaped base 2 is a first gear portion of the internal gear type formed to engage with the arc-shaped gear portion 37 ( 28 and a second gear portion 9b, which is provided to be resilient in position and engages with the rotary gear 7, the second gear portion 9b is formed in the movable body 9, and has a box shape. The gear cover 10 attached to the base 2 is characterized in that it is elastically displaced through the movable body 9. In addition, the box-shaped base body 2, the door body 3, the movable body 9, and the gear cover 10 which are main members are all resin molded articles.

(Example)

The box-shaped base body 2 is open at the upper surface side, and its inner portion 21 is partitioned by the locking means placing portion 22 and the flange 26 at the front middle portion, and both sidewall portions 23 are formed. The front side wall part 23b is once inclined with respect to the rear side wall part 23a, and the window part 24 is formed in the end surface of this stepped part, and the front wall part 25 is It has the space part 25a corresponding to the mounting part 22. As shown in FIG.

The flange portion 26 is formed so as to surround the upper surface side opening in a state where the front side and both sides protrude so that the door body 3 is accommodated in the closed position. The interior 21 is sized to accommodate the door body 3 in a standing state on the back side. The mounting part 22 is provided with the attachment hole, The locking means 4 is attached to this attachment hole. The locking means 4 is locked by being pushed and pushed by a push and push mechanism such as that shown in Patent Document 1, i.e., the door 3 in the closed position direction, and is locked by pressing again in the same direction. It becomes the structure that becomes. However, the locking means 4 may be a mechanism other than the above. In addition, in this embodiment, the box-shaped base body 2 is provided in the state which the lower part below the flange part 26 fits in the recessed part of the instrument panel or center console in a compartment.

Both side wall portions 23 have the same shape, and the front side wall portion 23b is indented inward from the rear side wall portion 23a, and is formed on the step surface between the front side wall portion 23b and the rear side wall portion 23a. It has the window part 24 which communicates inside and outside of the box-shaped base body 2.

As shown in FIG.1 and FIG.6, the front side wall part 23b protrudes from the front of the window part 24 in the substantially arc-shaped attachment rib 27 and the guide rib 29. As shown in FIG.

The attaching rib 27 includes an arc-shaped portion 27a which forms the first gear portion 28, an approximately L-shaped connecting portion 27b connected to the lower side of the arc-shaped portion 27a, and It consists of an engaging piece 27c which has an engaging hole which protrudes from the horizontal part of the connection part 27b. The 1st gear part 28 is an internal gear type which forms continuous gear, and is convex toward the front, and is arrange | positioned up and down.

The guide rib 29 is located in the arc of the attachment rib 27 and has a guide wall portion 29a which has an arc shape having a center substantially the same as the arc shape portion 27a, and the lower end of the guide wall portion 29a. The locking wall part 29b extended inclined in the state which connected the substantially intermediate part to the support part, and the substantially cylindrical support shaft part 29c which hold | maintain a predetermined space | interval on the upper end side of the locking wall part 29b. The guide wall portion 29a is a portion for guiding the shaft portion 8b of the boss 8 to be described later so as to slide along the inner surface of the arc, and the upper end side is formed to receive the shaft portion 8b from the inside (Fig. 6 (b)}, the lower end side is connected in a state where the gap is gradually narrowed with respect to the locking wall portion 29b, so that downward movement of the shaft portion 8b can be regulated between the locking wall portion 29b and the locking wall portion 29b. {See FIG. 7 (b)}. The support shaft part 29c is a part which supports the finger holding means 5. That is, the gripping means 5 is made of a coil spring, the coil portion is fitted to the support shaft portion 29c, and the one end 5a of the coil spring is fixed to the locking wall portion 29b, and the other end of the coil spring ( 5b) is caught and fixed to the shaft portion 8b while increasing the elastic force. In addition, since the holding means 5 only needs to satisfy the requirement for holding the door 3 in the open position direction, the holding means 5 may have a configuration as shown in FIG. 8.

A gear cover 10 having a movable body 9 assembled thereon is attached to the attachment rib 27.

1, 4, and 5, the gear cover 10 covers the first gear portion 28, the guide ribs 29, the holding means 5, and the like, and the rear side portion. It is a shape which can insert the arm part 31 of the said door body 3 inside through the cut-out part 10a cut out, The opening part 11 of the substantially center formed corresponding to the movable body 9, and for attachment It has the attachment part 13 which protruded in the front edge corresponding to the arc-shaped part 27a of the rib 27, and the tongue piece 14 which protruded downward from the inner end of the lower wall. On both inner side surfaces of the opening 11, the locking pieces 12 are formed to face each other.

The movable body 9 includes a movable body 9a, a second gear portion 9b protruding above the front surface of the movable body 9a, and an elastic portion formed on the bottom surface of the movable body 9a. 9c) is integrally formed. Moreover, the movable body main body 9a has a substantially rectangular frame, and the front edge at both side frames slightly protrudes, and protrudes the locking projection 9d at a slight distance from the protruding portion. 5 (b)}. The 2nd gear part 9b is a structure of the spur gear which continuously forms the gear in the outer periphery of a cylinder, and is arrange | positioned in the substantially circular arc center of the 1st gear part 28, and meshes with the rotary gear 7. The elastic part 9c is formed in the shape of a bow or U-shape, and is elastically deformed so that the cavity part may be reduced when the movable body main body 9a is loaded in the downward direction.

As shown in FIG. 5, the movable body 9 is assembled to the opening 11 of the gear cover 10 by an insertion operation inside the gear cover 10. That is, when the movable body 9 is press-fitted into the opening 11 from the inside of the gear cover 10, each locking protrusion 9d elastically rides over the corresponding locking piece 12 in the opening 11. As a result, the locking piece 12 is fitted between the protrusion and the locking protrusion 9d, and the movable body 9 is slidably supported in the opening portion 11 in the up and down direction in the fitted state. In this supporting state, the second gear portion 9b protrudes into the gear cover 10.

On the other hand, the gear cover 10 overlaps the attachment part 13 with the corresponding part of the attachment rib 27 with respect to the side wall part 23 of the box-shaped base body 2, as shown in FIG. ) Is positioned so as to be positioned in a state of being engaged with the engagement hole of the engagement piece 27c of the attachment rib 27, and is attached by a screw or the like not shown.

On the other hand, the door 3 has a flat plate shape, the upper surface of which is covered with the cover material 30, and is provided at the tip of the support arm portion 31 and the support arm portion 31 protruding from both rear sides thereof. It has the formed disc part 32. The supporting arm portion 31 is protruded to the outside through the window portion 24 of the box-shaped base 2, that is, to the front side wall portion 23b of the side wall portion 23. The disc portion 32 has a gear portion 37 formed on its outer circumference, and has a stepped attachment portion 33 for damper means and a fitting hole 33a penetrating through the center of the attachment portion 33. Have. The fitting hole 33a is formed of a large hole on the side of the attachment portion 33 and a small hole inside thereof, corresponding to the boss 8 described later (see FIG. 4).

The attachment portion 33 is equipped with a damper means (6). The damper means 6 consists of a well-known rotary oil damper etc., and has the output shaft which receives the resistance of the hydraulic oil filled in the damper main body 6a, and the rotary gear 7 attached to this output shaft. In this structure, the boss 8 is connected to the bottom of the main body on the side opposite to the output shaft of the damper main body 6a. The boss 8 has a large diameter attachment portion 8a and a cylindrical shaft portion 8b having a diameter smaller than that of the attachment portion 8a. The boss 8 has an attachment portion (8) with respect to the bottom surface of the damper body 6a. Through 8a). In the damper means 6, the damper main body 6a is disposed in the attachment portion 33 in a state where the shaft portion 8b protrudes outward from the fitting hole 33a. Attached. In this state of attachment, the shaft portion 8b protrudes into the arm portion 31 to lightly contact the inner surface of the arc of the guide wall portion 29a of the guide rib 29, and the rotary gear 7 is arm portion 31. It protrudes outward and engages with the gear of the second gear portion 9b of the movable body 9.

The door body 3 is assembled to the box-shaped base body 2 in the following manner, for example. First, while holding the coiling means 5 so that the one end 5a may be caught by the latching wall portion 29b, the coil portion is held by the support shaft portion 29c. In this state, the arm part 31 protrudes through the corresponding window part 24 to bring the gear part 37 into contact with the first gear part 28, and then the other end 5b of the holding means 5 is opened. It is fixed to the shaft portion 8b while increasing the elastic force. Next, the gear cover 10 which assembled the movable body 9 is attached to the box-shaped base body 2 by the above-mentioned method. At this time, the second gear portion 9b of the movable body 9 comes into contact with the rotary gear 7. In this case, the door body 3 is formed with respect to the box-shaped base body 2, and the gear parts of the gear part 37 and the first gear part 28, the rotary gear 7 and the second gear part 9b are each other. It is rotatably supported through its engagement.

The door opening and closing mechanism of the present invention can also omit the damper means 6 described above. In this case, for example, a rotary gear such as the rotary gear 7 is attached to the disc part 32 so as to be rotatable, and the boss 8 is attached to the corresponding part of the disc part 32.

(work)

Subsequently, the opening and closing operation of the door 3 will be described with reference to FIGS. 6 and 7. 6, (a) is a side view which shows typically the state in which the door body 3 was arrange | positioned in the closed position, (b) is the boss 8 and the holding means 5 of this closed position. It is a figure which showed the sun typically. In addition, in FIG. 7, (a) is a side view which shows typically the state in which the door body 3 was arrange | positioned in the open position, (b) is the boss 8 and the holding means 5 of this open position. It is a figure which showed the sun typically. In addition, in each figure, since the gear mechanism part is not seen by the gear cover 10, the gear cover 10, the movable body 9, the holding means 5, etc. are shown by the virtual line.

FIG. 6 shows a state in which the door body 3 is in the closed position which completely closes the opening of the box-shaped base body 2. In this closed position, the door body 3 is locked by the locking means 4 against the elastic force of the holding means 5. The gear part 37 meshes with an upper gear among the internal gears of the first gear part 28, and the rotary gear 7 meshes with an upper gear among the outer gears of the second gear part 9b. Then, when switching the door body 3 to the open position, the front side of the door body 3 is pushed downward (this means that the door body 3 is again in the same direction, namely, in the closed position of the door body 3. It will be pushed in the closed position.} Release. In this case, since the engaging state 34 of the door body 3 is released by the locking means 4, the door body 3 is moved in the open position direction by the elastic force of the holding means 5. Will be rotated.

In the process of reaching the open position of FIG. 7, the gear portion 37 moves downward from the upper gear to the lower gear while meshing with the internal gear of the first gear portion 28. At the same time, the rotary gear 7 meshes with the outer gear of the second gear portion 9b and rotates around the second gear portion 9b, ie, in conjunction with the gear portion 37, the lower gear in the upper gear. Move down to. That is, in this structure, the gear part 37 rotates along the trajectory of the internal gear of the first gear part 28, and the rotary gear 7 has a planetary motion centering on the second gear part 9b. By obtaining a similar operation, the door body 3 is rotated in the open position direction with downward movement. In this rotation switching process, the speed is alleviated by the engagement of the gear parts described above, and the braking by the damper means 6 is also received. Therefore, the door 3 always moves at almost constant speed from the closed position to the open position.

In the open position of FIG. 7, the amount of protrusion of the door body 3 protruding from the box-shaped base body 2 by the downward movement of the door body 3 can be reduced, and appearance characteristics are also good.

Moreover, when switching the door body 3 back to a closed position, the protrusion part of the door body 3 is pulled out, resisting the elastic force of the finger holding means 5. In this way, this time, the gear part 37 meshes with the internal gear of the 1st gear part 28, and moves upward from a lower gear to an upper gear. At the same time, the rotary gear 7 meshes with the outer gear of the second gear portion 9b while rotating around the second gear portion 9b, ie, in conjunction with the gear portion 37, the upper gear in the lower gear. Move up to. In the closed position, the engaging piece 34 is caught and fixed by the locking means 4.

The above basic operation is almost the same as in Patent Document 1. This structure is excellent in that the following operation | movement is obtained compared with patent document 1.

(1) When the door body 3 is in the closed position of Fig. 6, when a large downward load F is received, a load is applied to the rotary gear 7 and the second gear part 9b, among the gear mechanism parts. That is, as shown in (c) and (d) of FIG. 5, when the second gear portion 9b receives the downward load Y from the rotary gear 7 side, the movable body 9 is the elastic portion. The positional displacement is relatively lowered along with the elastic displacement of 9c. As a result, the rotary gear 7 absorbs and relaxes the load due to the elastic position displacement of the elastic portion 9c, so that the rotary gear 7 is not subjected to excessive load on the meshing portion of the gear and the output shaft. . Therefore, in this structure, it is possible to reliably prevent the risk of oil leakage from the damper main body 6a by damaging the output shaft of the damper means 6 and the engagement portion between the gears.

(2) In this structure, the door body (3) is rotated through the engagement of the gears described above. In this rotation process, since the shaft portion 8b coupled to the damper body 6a slides along the guide wall portion 29a, even if the box 1 is subjected to vibration in the up and down direction, the engagement between the gears can be stably maintained. have.

(3) In this structure, since the upper end side of the guide wall portion 29a is formed in a curved shape capable of accepting the shaft portion 8b from the inside, the door body 3 receives the above downward load F in the closed position. On receiving, the shock absorption by the cylindrical shape of the upper end part of the guide wall part 29a and the shaft part 8b is also obtained (refer FIG. 6 (b)). Moreover, the lower end side of the guide wall part 29a is formed so that the space | interval may be gradually narrowed with respect to the latching wall part 29b, and when the door body 3 reaches the open position, the downward movement of the shaft part 8b is guided. Since it restricts by between the lower end side of 29a) and the engaging wall part 29b, the door body 3 does not loosely stumble in the open position (refer FIG. 7 (b)).

(4) The above operations (1) to (3) function in the same manner when the box-shaped base body 2 is set to the horizontal arrangement instead of the vertical arrangement of the present embodiment, that is, the opening is set in the front-rear direction. Moreover, the mechanism and apparatus of this invention can be applied also to the specification by which the door body 3 serves as an armrest part and a simple table part.

As described above, the door opening and closing mechanism and the door opening and closing device of the present invention have the following effects.

In the invention described in claim 1, by providing the door opening and closing mechanism so that the second gear portion can be elastically displaced, the problems listed as problems can be solved at once, thus improving the quality and reliability compared to that of Patent Document 1. Can be. For example, the door body can be used as an armrest part, a simple table, or the like, that is, the door body can be applied even in a design in which a large load is applied, thereby expanding the use of the door body. In the above mechanism invention, in the case of claim 2, the second gear portion capable of elastic positioning can be realized with a simple configuration through the gear cover. In the case of Claim 3, it can further simplify by interposing a movable body as a support structure of a 2nd gear part.

In the invention as set forth in claim 4, the door opening and closing device comprising the gripping means, the locking means, and the damper means, in addition to the advantages of the door opening and closing mechanism, the rotary gear of the door opening and closing mechanism can be substituted for the damper means. As a result, the assembly properties can be improved or the cost can be reduced. In the above device invention, in the case of claim 5, the rotation switching characteristic can be further stabilized by the guide means.

Claims (5)

In the door opening and closing mechanism for rotating the door body to the closed position for closing the opening of the gas and the open position for opening the opening with respect to the box-shaped gas, The door body protrudes a supporting arm portion, and has an arc-shaped gear portion formed in the arm portion and a rotary gear attached to an approximately arc center of the gear portion. The base has a first gear portion of the internal gear type formed to engage the arc-shaped gear portion and a second gear portion that is installed to be elastically displaceable and engages with the rotary gear, The door body is pivotally switched to a trajectory corresponding to the first gear portion through respective engagements of the arc-shaped gear portion with respect to the first gear portion and the rotary gear with respect to the second gear portion, and from the outside in the closed position. And a load applied to the rotary gear due to this load when absorbed in the bottom direction of the gas, by the elastic position displacement of the second gear portion. The method according to claim 1, And a gear cover attached to the base, the gear cover supporting the second gear portion so as to be elastically displaceable. The method according to claim 2, And the second gear portion is formed on the movable body which is slidably attached to the gear cover and is supported in one direction. The door body is rotated to the closed position for closing the opening of the box-shaped gas and the open position for opening the opening, and released from the closed position in response to the holding means held in the open position direction and the elastic force of the holding means. In the door opening and closing device having a locking means and a rotary damper means to be fixed by hanging, The door body is switched to the closed position and the open position by the door opening / closing mechanism according to any one of claims 1 to 3, and the damper means attaches a damper body to the arm portion, and the door is connected to an output shaft of the damper body. A door opening and closing device for mounting a rotating gear of the opening and closing mechanism. The method according to claim 4, A shaft portion protruding on a bottom surface of the main body opposite to the output shaft in the damper main body of the damper means, and an arc-shaped guide wall portion protruding from the base and having substantially the same trajectory as the first gear portion; And said shaft portion has a guide means for slidingly moving along said guide wall portion in the rotation switching process of the sieve.

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