JPH066663U - Front door device - Google Patents

Abstract

(57) [Abstract] [Purpose] A front door device having a simple structure that does not cause interference between the front door and the front panel when the door is opened and closed, and can narrow the gap between the two in the opened state as much as possible. provide. [Structure] A front door 2 has a rotation shaft horizontally arranged in an opening 11 provided in a front surface of a cabinet 1, and can be freely opened and closed with a lower end of the door being a proximal base side and an upper end of the door being a distal end side. In the deployed front door device, a door opening / closing mechanism that connects the front door 2 and the cabinet 1 is integrally formed at a support arm 37 projecting from a lower end portion of the front door 2 and a tip portion of the support arm. The gear portion 35, the gear mechanism that is disposed inside the cabinet and has the tooth surface 32 with which the gear portion 35 should mesh, and the gear portion 35 of the support arm and the tooth surface 32 of the gear mechanism are always kept in mesh with each other. And connecting mechanisms 33 and 36 for

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front door device for opening and closing an opening provided in the front surface of a cabinet in various electronic devices such as a television receiver and a stationary video tape recorder.

[0002]

[Prior art]

 In this type of front door device, as shown in FIGS. 10 (a) and 10 (b), the front door (2) has its rotating shaft horizontally arranged in the opening (11) provided in the front surface of the cabinet (1), The lower end of the door is the base side of the rotation, and the upper end of the door is the front end side of the rotation. The front door (2) and the cabinet (1) are connected by, for example, a door opening / closing mechanism (30) made up of a plurality of links, whereby the front door (2) moves from a vertical position in the closed position to a substantially horizontal position in the open position. It will rotate outward to the posture around a fixed rotation axis.

[0003]

[Problems to be solved by the device]

Generally, when the front door (2) is closed as shown in FIG. 11, the front door (2) is housed inside the cabinet so that it does not protrude from the front surface of the front panel (12) in the opening (11) provided in the cabinet (1). Are placed. In this case, in order to prevent interference between the door base end and the corner C of the front panel part (12) in the process of opening the front door (2) as shown by the arrow, the front door (2) is rotated. The axis A ₀ needs to be set outside the inner surface of the front panel portion (12), that is, below the opening (11).

However, in the above-mentioned front door device, since the rotation axis A ₀ of the front door (2) has to be set outside the inner surface of the front panel portion (12), the front door (2) cannot be set. Shows a large gap D between the front face of the front panel (12) and the base end of the front door (2) in the open state as shown by the chain line in FIG. There was a problem.

The gap between the front door (2) in the opened state and the front surface of the front panel is narrowed as much as possible, and the interference between the front door (2) and the front panel portion (12) at the time of opening and closing the door is prevented. Must be equipped with a complicated door opening / closing mechanism consisting of a cam and a link mechanism in order to set the movement locus of the front door (2) at the time of opening operation to an appropriate curve, which complicates the device configuration. The problem arises.

An object of the present invention is to provide a simple structure that can prevent the interference between the front door and the front panel when the door is opened and closed and can narrow the gap between the front door and the front panel in the opened state as much as possible. Is to provide a front door device.

[0007]

[Means for solving the problem]

 In the front door device according to the present invention, the door opening / closing mechanism connecting the front door (2) and the cabinet (1) has a supporting arm projecting from the lower end of the front door (2) toward the inside of the cabinet (1). In addition, a gear portion having a central axis parallel to the rotation axis of the front door (2) is integrally formed at the tip of the support arm. On the other hand, inside the cabinet (1), there is a tooth surface on which the gear portion of the support arm should mesh, and the opening operation of the front door (2) is performed when the gear portion of the support arm meshes with the tooth surface. Along with this, a gear mechanism for raising the position of the central axis of the gear portion of the support arm and a coupling mechanism for keeping the gear portion of the support arm and the tooth surface of the gear mechanism in a meshed state at all times are provided.

[0008]

[Action]

 During the process of opening the front door (2) from the closed vertical position to the open horizontal position, the support arm rotates integrally with the front door (2), and the gears of the support arm are geared accordingly. It rotates while meshing with the tooth surface of the mechanism. At this time, the gear mechanism receives the motive power due to the rotation of the gear portion of the support arm with the opening operation of the front door (2), that is, the rotation of the gear portion of the support arm, and raises the position of the central axis of the gear portion. .

Since the central axis of the gear portion of the support arm becomes the instantaneous rotation center of the front door (2), the rotation center of the front door (2) rises in the process from the start to the end of the opening operation. Will be done.

Therefore, in the first half of the opening operation, since the center of rotation of the front door (2) is located sufficiently below the lower edge of the cabinet opening (11), the movement of the front door (2) is The horizontal movement component becomes larger than the vertically downward movement component, and the front door (2) should come out of the opening (11) in a substantially horizontal direction and interfere with the corners of the front panel (12). There is no.

In the latter half of the opening operation, the center of rotation of the front door (2) is located above and close to the lower edge of the cabinet opening (11). The vertically downward moving component becomes larger than the directional moving component, and the front door (2) mainly moves downward from the state where it has slipped out of the opening (11). As a result, when the front door (2) is completely opened, the gap between the base end of the front door (2) and the front surface of the front panel is set as small as possible.

[0012]

[Effect of device]

 In the front door device according to the present invention, there is no risk of interference between the front door and the front panel when the door is opened and closed, and it is possible to narrow the gap between the front door and the front panel in the opened state as much as possible. . Further, the door opening / closing mechanism is composed of the gear mechanism and the connecting mechanism, and the structure is simpler than that of the conventional link mechanism.

[0013]

【Example】

 Hereinafter, two embodiments of the present invention will be specifically described with reference to the drawings. The door opening / closing mechanism described later is provided on each side of the front door, but only one of them will be described because they have the same structure.

First Embodiment (FIGS. 1 and 2) In the door opening / closing mechanism (3) shown in FIG. 1, a U-shaped support arm (37) is provided inside the cabinet (1) on the back surface of the front door (2). The connecting shaft (36) is integrally installed between the ends of both arms. A pinion (35) is attached to the center of the connecting shaft (36).

On the other hand, on the cabinet (1), a frame body (31) having a U-shaped cross section is fixed by being sandwiched between the support arms (37), and a central portion of the inner surface of the frame body (31) is fixed. A rack (32) which always meshes with the pinion (35) is formed in the vertical direction. Further, guide grooves (33) (33) extending in the vertical direction are formed on both side walls of the frame (31), and the connecting shaft (36) slidably penetrates through the guide grooves.

Thus, the rack (32) constitutes a gear mechanism, and the guide groove (33) of the frame (31) and the connecting shaft (36) fitted in the guide groove (33) constitute a connecting mechanism. .

As shown in FIG. 2, when the front door (2) is rotated clockwise from the closed position housed in the opening (11) of the cabinet (1) to open to a horizontal posture, the front door (2) With the rotation of (2), the pinion (35) rotates clockwise while meshing with the rack (32) of the frame (31).

As a result, the center of rotation A ₁ at the time of starting the opening operation of the front door (2) rises to the position A ₂ which is a distance S upward depending on the rotation angle of the pinion (35). Become.

Therefore, in the first half of the opening operation, since the center of rotation of the front door (2) is located sufficiently below the lower edge of the cabinet opening (11), the front door (2) is opened (1). It does not come out from 1) in a substantially horizontal direction and does not interfere with the corners of the front panel section (12).

In the latter half of the opening operation, the center of rotation of the front door (2) is located above and close to the lower edge of the cabinet opening (11), so that the front door (2) opens. After moving out of the front door, it moves mainly downward, and the gap between the base end of the door and the front of the front panel is set as small as possible when the front door (2) is completely open. .

According to the door opening / closing mechanism (3), one rack (32) constitutes a gear mechanism, and a gear mechanism for constantly meshing the rack (32) with the pinion (35) at the tip of the support arm. The connection mechanism is simply configured by the guide groove (33) of the frame body (31) and the connecting shaft (36).

Second Embodiment (FIGS. 3 to 9) The door opening / closing mechanism (4) shown in FIGS. 3 to 5 has a side arm (6) (FIG. 8) protruding from the rear surface of the front door (2). The gear mechanism (61) is integrally formed at the front end of the gear unit (see), and the gear mechanism having the tooth surface with which the gear unit (61) is to be meshed is composed of a plurality of gear members.

That is, a base body (41) (see FIG. 6) having a gear part (43) is arranged on the cabinet (1), and bosses (44) (45) formed on the base body (41). Screws (42) and (42) are passed through and screwed to the cabinet (1) to fix the base body (41) to the cabinet (1).

The fan gear (5) (see FIG. 7) is arranged so as to overlap the base body (41). The fan gear (5) is integrally formed with a first gear part (51) that is constantly meshed with the gear part (43) of the base body (41), and at the same time, the second gear part (52) serving as the tooth surface. Is integrally formed, and this is always meshed with the gear part (61) of the arm (6).

As shown in FIGS. 6 to 8, the center of rotation of the gear part (43) of the base body (41), the first gear part (51) of the fan gear (5), and the gear part (61) of the arm (6). Axial holes (40), (50) and (60) will be opened in each of these. As shown in FIG. 4, the support shafts (72), (73) and (71) projectingly fixed to the holder (7) were fitted into these shaft holes so as to be rotatable relative to each other, and the fan-shaped gear (5 ) And the position of the arm (6) are regulated so that the gear part (43) of the base body (41) and the first gear part (51) of the sector gear (5) are constantly meshed with each other, and the first part of the sector gear (5) is 2 The gear part (52) and the gear part (61) of the arm (6) are always meshed.

At the base end of the arm (6), a pair of pinching pieces (62) (62) having a columnar space formed in the center are projected, and an engaging portion with the front door (2) is provided. Has been formed. On the other hand, on the back surface of the front door (2), the pair of pinching pieces (62) (62) is engaged with the round shaft (22) protruding from the inside of the frame body (21) to be fitted. A part is formed, and the arm (6) and the front door (2) are integrally connected by the engagement of both as shown in FIG.

In the door opening / closing mechanism (4), the gear part (61) of the arm (6) moves to the second gear of the sector gear (5) while the front door (2) opens from the vertical posture to the substantially horizontal posture. It rotates clockwise while meshing with the gear part (52). As a result, the sector gear (5) rotates counterclockwise while the first gear part (51) meshes with the gear part (43) of the base body (41).

At this time, the support shaft (73) of the arm (6), the support shaft (72) of the sector gear (5), and the support shaft (71) of the base body (41) are held relative to each other by the holder (7). Since the distance is kept constant, the support shaft (73) of the arm (6) and the support shaft (72) of the sector gear (5) are respectively anti-centered around the support shaft (71) of the base body (41). Revolve clockwise. Therefore, in the process of opening the front door (2), the center of rotation of the front door (2), that is, the support shaft (73), rises from the lower end position shown in FIG.

FIG. 9 shows the gear part (61) of the arm (6) associated with the opening operation of the front door (2), the first and second gear parts (51) (52) of the sector gear (5), and the base body. The movement path of the gear part (43) of the above is drawn, and the central axis of the gear part (61) of the arm (6), that is, the instantaneous rotation center of the front door (2) is the door closed state as shown in the figure. From position A ₁ to position A ₂ when the door is open, the distance S has risen substantially vertically.

In this process, the front door (2) opens without interference with the front panel part (12) of the cabinet (1), and in the fully opened state, the base end part and the front panel part of the front door (2). The gap D of (12) is set to be extremely small.

According to the door opening / closing mechanism (4), the number of parts is slightly larger than that of the door opening / closing mechanism (3) shown in FIG. It is possible to set the rising distance of the center of rotation of the front door (2) to a sufficient value.

In each of the door opening / closing mechanism (3) shown in FIG. 2 and the door opening / closing mechanism (4) shown in FIG. 3, each constituent member should be arranged deeper than the opening (11) of the cabinet (1). Therefore, the housing portion of the door opening / closing mechanism does not protrude from the front surface of the front panel.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the scope of the utility model registration request or reducing the scope. Further, the configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the scope of claims for utility model registration.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a front door device according to the present invention.

FIG. 2 is a diagram illustrating an operation of the front door device.

FIG. 3 is a side view showing a second embodiment of the front door device according to the present invention.

FIG. 4 is an exploded perspective view of the front door device.

FIG. 5 is a plan view of the front door device.

FIG. 6 is a side view of a base body.

FIG. 7 is a side view of a sector gear.

FIG. 8 is a side view of the arm.

FIG. 9 is a diagram showing a movement trajectory of each member associated with the opening operation of the front door.

FIG. 10 is a perspective view showing an appearance of a conventional front door device.

FIG. 11 is a diagram for explaining the operation of the conventional front door device.

[Explanation of symbols]

 (1) Cabinet (11) Opening (12) Front panel (2) Front door (3) Door opening / closing mechanism (4) Door opening / closing mechanism (37) Support arm (35) Pinion (31) Frame (32) Rack

Claims (1)

[Scope of utility model registration request] 1. An opening (1) provided in a front surface of a cabinet (1).
In 1), the front door (2) is arranged so that the rotating shaft is horizontally arranged, and the lower end of the door is the proximal side of the rotation and the upper end of the door is the distal side of the rotation so that it opens to the outside of the cabinet (1). In the front door device described above, the door opening / closing mechanism that connects the front door (2) and the cabinet (1) has a support arm protruding toward the inside of the cabinet (1) at the lower end of the front door (2). , The front door integrally formed at the tip of the support arm
The gear part having a central axis parallel to the rotation axis of (2), and the gear part of the support arm which is disposed inside the cabinet (1) and has the gear part of the support arm to mesh with, and the gear surface of the support arm The gear mechanism that raises the position of the central axis of the gear portion of the support arm along with the opening operation of the front door (2) in the state where the parts are meshed, the gear portion of the support arm, and the tooth surface of the gear mechanism. A front door device, comprising: a connecting mechanism that keeps the meshing state at all times.