JPH0670293U - Electronic device fixing mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] With a simple configuration, without using any tools, it is possible to attach / detach optional equipment to / from the electronic equipment body without fail. [Structure] A fixing mechanism for a removable optional device to be added to an electronic device main body, and a shaft having a substantially D-shape near its tip as an attachment means to the electronic device main body 1 on the optional device 2 side. 5 and groove 8 that serves as a guide when mounted
The shaft 5 has a body retaining pin 3 that engages with the groove 8 near the tip, and a means 9 that biases the shaft 5 in a direction away from the electronic device body 1 in the middle. The electronic device main body 1 side has a key hole 11 into which the shaft 5 and the main body locking pin 3 are inserted, and means for restricting the rotation of the shaft 5 to a constant angle, and the shaft 5 is rotated. By doing so, an electronic device fixing mechanism for fixing the optional device 2 to the electronic device main body 1 is realized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixing mechanism for a removable optional device that is later added to a main body of an electronic device.

[0002]

[Prior art]

 As shown in FIG. 5, the fixing mechanism of the optional device 2 of the conventional electronic device is such that the arm 12 is pulled out from the optional device side 2 and hooked in the hole 13 on the main body 1 side, or as shown in FIG. As shown in FIG. 7, a mechanism for fixing to the main body 1 by using a screw 14, and as shown in FIG. 7, an optional device 2 is provided with a latching pin 3 and a knob 4, and a shaft biased forward by a spring 9 A mechanism or the like is used, which is inserted into a keyhole 15 opened in the device body 1 to rotate the locking pin 3 and fix it by a restoring force of a spring 7.

[0003]

[Problems to be solved by the device]

 However, in the conventional mechanism for fixing optional equipment, the mechanism shown in FIG. 5 cannot be attached / detached if the electronic equipment main body 1 has a shape protruding above the optional equipment 2. Further, although the mechanism shown in FIG. 6 is reliable, a tool for turning the screw 14 is required, which makes attachment and detachment very complicated. Further, in the mechanism shown in FIG. 7, the knob 4 may rotate and may not be held when it is fixed. In addition, since the latching pin 3 rotates even before entering the keyhole 15, there is a problem such as incorrect mounting.

The present invention has been made to solve the above problems, and an object of the present invention is to easily and securely attach / detach an optional device to / from an electronic device body with a simple mechanism without using a tool. An object of the present invention is to provide a fixing mechanism of an electronic device capable of performing. The above and other objects and novel features of the present invention will be made clear by the description of the present specification and the accompanying drawings.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the fixing mechanism of the optional equipment to the electronic equipment main body according to the present invention is such that the optional equipment side has a main body locking pin that engages with the groove near the tip end, and the shaft at the middle portion. Means for urging the electronic device body away from the electronic device body, and means for restricting the rotation of the shaft and the hole into which the shaft and the body retaining pin are inserted to a certain angle on the electronic device body side The main feature is that the optional device is fixed to the electronic device main body by rotating the shaft.

[0006]

[Action]

 According to the means described above, when the optional device is mounted on the electronic device body, the locking pin of the mounting means passes through the groove that serves as a guide, so the shaft (knob) must be rotated until it goes beyond the key hole of the electronic device body. It doesn't move. When the mounting means enters the body of the electronic device, the shaft (knob) rotates, and the biasing means biases the shaft in the direction away from the body, so that the latching pin of the mounting means fits inside the keyhole. The optional equipment is attached to the electronic equipment itself. When the shaft is rotated in the opposite direction, the mounting means is disengaged from the key hole of the main body and the option device is disengaged from the electronic device body when the mounting means and the key hole of the main body are aligned. Even if the shaft is in the locked position when the optional device is installed, that is, even if the main body locking pin exceeds the guide, the main device locking pin is pinched between the electronic device main body and the optional device guide during mounting, The device cannot be installed without going deep.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the figures, those having the same function are designated by the same reference numeral, and repeated description thereof will be omitted. FIG. 1 is a perspective view showing an embodiment of the present invention as seen through. Reference numeral 1 is a main body of an electronic device, for example, a thermal transfer recording device. Reference numeral 2 is an optional device, for example, a cutter unit, which is schematically shown in FIG.

In FIG. 1, a shaft 5 having a body retaining pin 3 and a knob 4 for mounting on the electronic device body 1 passes through the option device 2. Further, the option device 2 has a guide 7 arranged so as to be engaged with the electronic device body 1, and the latch pin 3 is adapted to pass through a groove 8 formed in the guide 7. That is, the groove 8 serves as a guide for the shaft 5 when mounted.

A compression coil spring 9 as a biasing means is arranged in the middle portion of the shaft 5, that is, between the retaining ring 10 and the inner wall of the option device 2, and the shaft 5 is biased in the direction of arrow A. The electronic device body 1 side is provided with a keyhole 11 through which the shaft 5 and the body retaining pin 3 are fitted.

When the optional device 2 is attached to the electronic device main body 1, the optional device 2 and the electronic device main body 1 are aligned with each other and the knob 4 is pushed, but the main body locking pin 3 is located in the groove 8 of the guide 7. When passing through, the knob 4 does not rotate and is not locked. When the knob 4 is pushed further toward the electronic device body 1 from this state, the shaft 5 moves while compressing the compression coil spring 9, and the body retaining pin 3 is inserted into the key hole 11 provided in the electronic device body 1. After that, the knob 4 is rotated clockwise by 90 degrees. Since the shaft 5 is biased in the direction of arrow A by the restoring force of the spring 9, the main body locking pin 3 is caught and the option device 2 is attached to the electronic device main body 1.

As shown in FIG. 2, the tip of the shaft 5 is D-shaped, and is structured so as not to rotate in the keyhole 11 of the electronic device body 1 by a certain angle, for example, 90 degrees or more. It has become. When the optional device 2 is detached from the electronic device main body 1, the knob 4 is rotated 90 degrees counterclockwise. When the body retaining pin 3 is aligned with the key hole 11 of the electronic device body 1, the restoring force of the spring 9 disengages the body retaining pin 3 and the optional device 2 is detached from the electronic device body 1 with one touch. When the optional device 2 is attached to the main body 1, the knob 4 is in the locked position, that is, the position where the main body locking pin 3 crosses the groove 8 serving as a guide and is not inserted into the key hole 11 of the main body. Even if there is, the main body retaining pin 3 is sandwiched between the electronic device main body 1 and the guide 7 of the option device 2 at the time of mounting, and the option device 2 cannot be mounted without going further. Therefore, it can be easily noticed to the operator, and there is no fear of being erroneously attached.

The structure of the knob 4 is shown in FIG. 3. As shown in FIG. 3, the knob 4 is made of an elastic material such as plastic, and a claw 16 is formed on the shaft 5. A groove 17 for fitting the claw 16 is provided on the shaft 5. The knob 4 can be easily assembled simply by inserting it from the direction of the arrow B. In this embodiment, description has been made assuming that a cutter unit is attached as the optional device 2 to the electronic device main body 1 of the thermal transfer recording apparatus, but this state is shown in FIG.

FIG. 4 is a schematic mechanism diagram when a cutter is attached to the thermal transfer recording apparatus. In the thermal transfer recording apparatus, the printing paper 18 is gripped by a capstan roller 19 and a pinch roller 20, and reciprocally printed. I do. Then, the thermal transfer recording apparatus can print on a full sheet of printing paper by mounting a cutter unit and cutting the gripping margin after printing is completed. Further, by changing the paper feeding device 21 for roll paper, it is possible to print on roll paper.

The present invention has been specifically described above based on the embodiments, but it goes without saying that various modifications can be made without departing from the scope of the invention. For example, the present invention can be applied to various electronic devices such as mounting a printer on a word processor as an optional device.

[0015]

[Effect of device]

 As described above, according to the present invention, the optional device can be easily attached to and detached from the electronic device main body without using a tool and reliably making a mistake.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention as seen through.

FIG. 2 is a diagram schematically showing a state in which a tip portion of a shaft is inserted into a keyhole in the present embodiment.

FIG. 3 is a cross-sectional view showing the structure of a knob in this embodiment.

FIG. 4 is a diagram schematically showing a state in which a cutter is attached to the thermal transfer recording apparatus of this embodiment.

FIG. 5 is a diagram for explaining a problem of the conventional technique.

FIG. 6 is a diagram for explaining a problem of the conventional technique.

FIG. 7 is a diagram for explaining a problem of the conventional technique.

[Explanation of symbols]

 1 Electronic Equipment Device Main Body 2 Optional Equipment 3 Main Body Locking Pin 4 Knob 5 Axis 6 Hole 7 Guide 8 Groove 9 Compression Coil Spring 10 Retaining Ring 11 Keyhole 12 Arm 13 Hole 14 Screw 15 Keyhole 16 Claw 17 Groove 18 Printing Paper 19 Capstan Roller 20 Pinch roller 21 Paper feeder

Claims (1)

[Scope of utility model registration request] 1. An attachment / detachment fixing mechanism for an optional device to be added to a main body of an electronic device, wherein the optional device has a shaft having a substantially D-shape near a tip end thereof and a groove serving as a guide at the time of mounting. The shaft has a body retaining pin that engages with the groove in the vicinity of the tip portion, and a means for urging the shaft in a direction away from the electronic device body in an intermediate portion. A shaft and a hole into which the main body locking pin is inserted, and means for restricting the rotation of the shaft to a certain angle, and the optional device is fixed to the electronic device main body by rotating the shaft. A fixing mechanism for electronic devices.