JPH072923Y2 - Door locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a door locking device, and is suitable as a door locking device for covering an opening for inserting a cassette of a VTR, for example.

[Prior Art] Conventionally, there is known a door locking device for covering an opening for inserting a cassette of a VTR, which is schematically shown in FIG. FIG. 5 is a plan view of the VTR as seen from above, and reference numeral 1 denotes a VTR casing. This casing is provided with a concave portion 2 on the front side thereof, and the concave portion (the front face of the casing is shown. Side) Although not shown, an opening for inserting a cassette is provided. Reference numeral 3 denotes a door fitted into the concave portion 2 so as to cover the opening, and in a direction in which an upper portion of the door is separated from the front surface of the housing 1 around a shaft 4 provided near the bottom of the housing 1. It is rotatably provided. Reference numeral 5 is a permanent magnet provided in the concave portion 2, and a metal plate 6 is fixed at a position of the door 3 facing the magnet. Reference numeral 7 denotes an operation button, which is provided on the front side of the housing 1 so as to be pressed. 8 is a follow-up rack,
The housing 1 is provided slidably in the direction of the arrow, and the operation button 7 is fixed to the end portion. A pinion 9 is rotatably provided on the housing 1 and meshes with the follow-up rack 8. Denoted at 10 is an extrusion rack, which is slidably provided in the housing 1 in the direction of the arrow, meshes with the pinion 9 and has its tip facing the recessed portion 2, and the door 3
Facing the back side of.

In the door lock device configured as described above, in the closed state, the sheet metal 6 is attracted by the magnet 5 as shown in the figure and the door 3 is closed.
Is locked. When the operation button 7 is pressed in this state, the rack 8 is slid to the rear side of the housing 1,
Since the rack 10 is slid to the front side of the housing 1 through the pinion 9, the door 3 is pressed by the rack 10 and the sheet metal 6
Moves away from the magnet 5 and the door 3 is opened.

[Problems to be Solved by the Invention] In the above-described door locking device, the door 3 can be reliably locked, the door can be unlocked quickly, and the door can be opened. In addition to the sheet metal 6, two racks 8 and 10 and a pinion 9 are required, and there is a problem that the number of parts is large.

An object of the present invention is to eliminate such drawbacks and provide a door locking device having a small number of parts.

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a housing has a fulcrum of rotation for engaging a pressing end portion for pressing a door and an engaging portion of the door. The lever is provided with an elastic member in which the hook portion and the pressed portion pressed by the operating member are integrally formed.

[Operation] In the door locking device as described above, in the closed state, the pressing end portion of the lever is pressed by the door, and the hook portion is biased and engaged in the direction in which it is engaged with the engaging portion. In this state, the lever is rotated by operating the operating member to press the pressed portion, the hook portion is disengaged from the engaging portion by the rotation, and the door is pressed by the pressing end portion to open the door.

[Embodiment] An embodiment in which the present invention is applied to a VTR will be described below with reference to FIGS. 1 to 4. FIG. 1 shows the main part of the front of the VTR, FIG. 2 shows the vertical cross section of the line BB in FIG. 1, and FIG. FIG. 4 is a perspective view of the main part.

In the drawing, reference numeral 11 is a VTR housing, and a recess 12 is provided on the front side of the housing, and an opening for inserting a cassette (not shown) is provided in the recess 12. Reference numeral 13 denotes a door that covers the above-mentioned opening, and a protrusion 14 is provided on a side surface of the door, and the protrusion is rotatably attached to the housing 11. That is, the door 13 is rotatably attached to the housing with the protrusion 14 as a fulcrum, and is fitted into the recess 12 in the closed state.

The housing 11 has a shell portion 15, a front wall portion 16, a side wall portion 17 on the side of the recess 12 and a front wall portion 23. This shell 15 and side wall
One end and the other end of the shaft portion 19 of the lever 18 which is also shown in FIG. The lever 18 is integrally formed by an elastic member such as polyacetal and has a pressing end portion 20, a hook portion 21, and a pressed portion 22. The pressing end portion 20 is loosely fitted in a hole 24 formed in the front wall portion 23 on the side of the recess 12 and faces the back side of the door 13. The hook portion 21 is loosely fitted in a hole 25 formed in the side wall portion 17 on the side of the concave portion 12 and is also loosely fitted in a notch portion 27 provided in the side wall portion 26 of the door 13, and the cut portion is cut. It can be engaged with an engaging portion 28 protruding from the notch.

Reference numeral 29 denotes an operation button (operation member), which has a collar portion 30 for preventing the slip-out, and is slidably attached to the front wall portion 16 of the housing 11. The tip of the operation button 29 is arranged so as to face the pressed portion 22 of the lever 18.

In the door locking device configured as described above, in the closed state shown in the figure, the pressing end portion 20 of the lever 18 is pressed by the door 13, and the lever 18 is rotated by this pressing to cause the hook portion 21. Is engaged with the engaging portion 28, and the door is locked in the closed state. When the operation button 29 is pressed in this state, the pressed portion 22 is pressed to rotate the lever 18, and the hook portion 21 is disengaged from the engaging portion 28 by the rotation. Lever 18
The arm portion 31 extending from the shaft portion 19 to the pressing end portion 20 is bent during the period from when the hook starts to rotate to when the hook portion 21 disengages from the engaging portion 28, and the hook portion as described above is caused by the force against this bending.
The door 13 is rapidly opened at the moment when 21 is disengaged from the engaging portion 28. In FIG. 2, the virtual line shows the door in the open state.

When the door 13 is manually closed from the open state, when the hook portion 21 gets over the engagement portion 28, the pressing end portion 20 is pressed by the door 13 and the arm portion 31 begins to bend. Further, by manually rotating the door 13 in the closing direction, the arm portion is
Due to the bending of 31, the hook portion 21 is reliably engaged with the engaging portion 28, and the door 13 is locked.

[Advantage of the Invention] As described above, the present invention is a door locking device that is rotatably provided in a housing of a device, and has a fulcrum of rotation in the housing and presses the door. And a hook portion that engages with the engaging portion of the door and a pressed portion that is pressed by the operating member are integrally provided with a lever formed of an elastic member that is radially formed around the pivot point of the rotation. In the door closed state, the pressing end portion of the lever is pressed by the door, and the hook portion is urged and engaged in the direction of being engaged with the engaging portion. The lever is rotated by pressing the pressing portion, the hook portion is disengaged from the engaging portion by the rotation, and the door is pressed by the pressing end portion so that the door is opened. The door can be locked securely and the door can be locked quickly. The door can be opened by releasing the lock.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a front view of an essential part, FIG. 2 is a vertical sectional side view of line BB in FIG. 1, and FIG. 1 is a cross-sectional plan view taken along the line AA of FIG. 1, FIG. 4 is a perspective view of a main part, and FIG. 5 is a plan view showing a conventional example. 11: Case, 13: Door, 14: Protrusion, 18: Lever, 20: Pressing end, 2
1: Hook part, 22: Pressed part.

Claims (1)

[Scope of utility model registration request] 1. A door locking device rotatably provided in a housing of a device, wherein the housing has a fulcrum of rotation, and a pressing end portion for pressing the door is engaged with the door. A hook portion that engages with the operation portion and a pressed portion that is pressed by the operating member are integrally provided with a lever formed of an elastic member that is radially formed around the fulcrum of rotation, and the lever is in a closed state. The pressing end is pressed by the door, the hook is biased and engaged in a direction in which the hook is engaged with the engaging portion, and the operating member is operated in the closed state to press the pressed portion. The lever is rotated by pressing, and the hook is disengaged from the engaging portion by the rotation, and the door is pressed by the pressing end so that the door is opened. Door locking device.