JPH0449726Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cover attachment mechanism for a pen-type barcode reading device.

(Prior art) Conventionally, in this type of pen-type barcode reading device, the attachment mechanism of the main body cover and the rear cover has a fourth
It was constructed as shown in Figure 5.

First, in FIG. 4, reference numeral 1 denotes a main body cover, and a screw 1a is cut on the inner surface of the rear end opening. 2
is a rear cover, and is provided with screws 2a that are screwed into screws 1a of the main body cover. 3 is a circuit board, 4 is a cable connecting the circuit board 3 and external equipment, 5
6 is a cable bush, and 6 is a caulking piece for preventing the cable from coming off. The circuit board 3, cable 4, etc. were attached to the rear cover 2 in advance, and both covers were attached by inserting the board part into the inside of the main body cover and screwing the screws 2a of the rear cover into the screws 1a of the main body cover.

However, this coupling method has the disadvantage that the threaded portion is likely to loosen because an external force such as pushing, pulling, bending, or rotating is applied to the rear cover 2 each time a bar code is read.

In another conventional example, as shown in FIG. 5, the inner surface of the rear end opening of the main body cover 1 and the outer peripheral surface of the insertion portion of the rear cover 2 are bonded and fixed using an adhesive 7. In this case, there was a problem that it could not be repaired because it could not be removed in principle. In addition, there was a problem that the workability during adhesion was poor and the adhesive would peel off later.
In FIG. 5, parts having the same names as those in FIG. 4 are given the same reference numerals.

(Purpose of the invention) The present invention solves the above-mentioned problems of the prior art, and provides a barcode reading device in which the main body cover and the rear cover can be easily connected, there is no loosening, and the barcode reader can be removed when necessary. A cover attachment mechanism is provided.

(Structure) A lock pin is provided with a plurality of recesses on the inner surface near the rear end of the main body cover, a plurality of engaging pawls facing the recesses on the rear cover, and a protrusion corresponding to each engaging pawl. Place on the rear cover.

When connecting the rear cover to the main body cover, turn the locking pin from the outside and press the rear part of the engaging pawl with the protrusion to engage the engaging pawl in the recess and lock it.
To remove it, turn the lock pin to release the pressure on the engaging pawl by the protrusion, and the engaging pawl will come out of the recess, allowing you to pull it out as it is.

(Example) Hereinafter, an example will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and FIG. 2 is an exploded view thereof. Reference numeral 11 denotes a main body cover of the pen-type barcode reading device, and a spherical body 17 made of ruby or sapphire, for example, is attached to the tip of the pen-shaped barcode reading device to scan the barcode in contact with or in close proximity to the barcode.
is fixed, the rear end is open, and two or more recesses 18 are formed on the inner surface near the rear end. Reference numeral 12 denotes a rear cover, which holds the other end of the circuit board 13 having an optical reading unit 19 mounted on its tip, and also holds the cable 1 connected to the circuit board.
4 is led out to the outside and is fitted into the rear end portion of the main body cover 11. The main body cover 1 is attached to the rear cover 12.
Engagement pawls 20 are provided that extend inward of the recess 1 and respectively face the plurality of recesses 18 . Since the engaging pawl 20 is formed integrally with the rear cover 12 from plastic, it has spring properties.

Reference numeral 21 denotes a lock pin arranged corresponding to each engagement claw 20, one end having a protrusion 21a protruding in the transverse direction with respect to the shaft is located on the back side of the engagement claw 20, and the other end having a split groove. 21b is rear cover 1
It is exposed to the outside of 2 and can be rotated around an axis. 15 is a cable bushing, 16 is a caulking piece, 22 is an elastic member made of rubber or the like, 23
is a member that supports and positions one end of the circuit board 13. The elastic member 22 is compressed to prevent backlash when the rear cover 12 is fitted to the main body cover 11.

When fitting the rear cover 12 to the main body cover 11, first attach the reading unit 19, circuit board 13, etc. that have been attached to the rear cover 12 to the main body cover 1.
1, and bring the rear cover 12 and the end of the main body cover 11 into contact, and then insert the engaging claw 20 into the main body cover 11.
facing the concave portion 18 of. At this time, the recess 18,
The relationship between the engaging claw 20 and the protrusion 21a of the lock pin is as shown in FIGS. 3a and 3c. In other words,
The protrusion 21a is oriented laterally to the back surface of the engagement claw 20, and no pressing force is applied thereto. Therefore,
A screwdriver is applied to the groove provided on the other end 21b of the lock pin 21, and the lock pin 21 is rotated 90 degrees. In this way, as shown in FIGS. 3b and 3d, the protrusion 21a of the lock pin presses the back surface of the engaging pawl 20, and the engaging pawl 20 engages with the recess 18 and is locked.

If the rear cover 12 is to be removed from the main body cover 11, the above-mentioned operation may be reversed.

In this way, according to this embodiment, the main body cover 1
1 and the rear cover 12 are extremely easy to fit and disengage, and there is no fear of loosening if they are fitted and locked.

(Effects of the Invention) As explained above, according to the present invention, the main body cover and the rear cover can be easily joined together without loosening, and can be easily removed when necessary.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of one embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is an explanatory diagram of the operation of the lock, and Figs. 4 and 5 are cross-sectional views of the conventional example. It is a diagram. 11...Body cover, 12...Rear cover, 13
... Circuit board, 14 ... Cable, 18 ... Recess, 19 ... Reading unit, 20 ... Engaging claw, 2
1...Lock pin, 21a...Protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] a. A main body cover of a pen-shaped barcode reader having a plurality of recesses formed on the inner surface near the open rear end, and b. A circuit board with an optical reading unit mounted on the tip. a rear cover that holds the other end and guides the cable connected to the circuit board to the outside and is fitted to the rear end of the main body cover; c. an engaging pawl extending and having a spring property facing each of the plurality of recesses; d disposed corresponding to each of the engaging pawls;
One end having a projection protruding transversely to the shaft is located on the back surface of the engaging claw, the other end having a split groove is exposed to the outside of the rear cover, and a plurality of A locking pin, wherein a rear cover is fitted to the rear end of the main body cover, the locking pin is rotated, and the protrusion presses the rear surface of the engaging pawl to engage the engaging pawl in the recess. A cover mounting mechanism for a barcode reader, characterized in that the cover is locked when the barcode reader is opened.