JPH069900U - Cutting pen - Google Patents

Abstract

(57) [Summary] [Structure] A pair of bearings 5 is built in the outer shaft 1.
The blade bar 9 is inserted into and removed from the inner ring 5A of the pair of bearings 5 so as to be freely inserted and removed. The blade rod 9 is formed of a rod-shaped body, and a blade portion 9A is formed at its tip, and a rear end portion 9B is formed in a conical shape. Further, the inner ring 5 of the pair of bearings 5
A fixture including a front fixture 6 and a rear fixture 7 is held between A, and an O-ring 8 is attached between the rear end of the front fixture 6 and the inner stage 7B of the rear fixture 7. With this O-ring 8,
The blade bar 9 inserted into the inner ring 5A of the bearing 5 is press-fitted and locked so that it can be pulled out. [Effect] Since the O-ring 8 is attached without being compressed and having an appropriate elastic force, the blade bar 9 press-fitted and locked by the O-ring can be easily pulled out or inserted and replaced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting pen used for an automatic cutting plotter or the like.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there has been known a cuffing pen in which an O-ring is interposed between the inner rings of a pair of bearings as a structure for easily and exchangeably fixing and supporting a blade.

[0003]

[Problems to be solved by the device]

 However, when the O-ring is strongly clamped between the bearings due to variations in dimensions, the above-mentioned conventional one loses elasticity of the O-ring, and the holding force of the blade becomes extremely strong or, conversely, becomes extremely weak. There was fear. An object of the present invention is to provide a cutting pen that solves the above problems.

[0004]

[Means for Solving the Problems]

 According to the present invention, a pair of bearings are built in the outer shaft directly or through another member, and the blade bar is inserted into and removed from the inner ring of the pair of bearings. A fixture is provided between the pair of bearings, and the O-ring attached to the fixture is used to press-fit and lock the blade bar so that the blade can be pulled out. Therefore, the blade bar is guided by a pair of bearings so as to be rotatable about the axis line, and is press-fitted and supported by an O-ring so that it can be pulled out.

[0005]

【Example】

 An embodiment of the present invention will be described with reference to FIG. 1. An inner shaft 2 is screwed to an outer shaft 1, and a tip metal 3 is screwed to a front portion of the inner shaft 2. Moreover, an O-ring 4 for preventing loosening of the screw is interposed between the inner shaft 2 and the tip metal 3. A pair of bearings 5 are built in the front part of the inner shaft 2, and a fixing tool including a front fixing tool 6 and a rear fixing tool 7 is held between inner rings 5A of the bearing 5. The fastener will be described in more detail. The front inner side 7A of the rear fixture 7 is press-fitted into the rear outer side 6A of the front fixture 6, and the rear end of the front fixture 6 and the inner step 7B of the rear fixture 7 are connected. An O-ring 8 is attached between the two. Further, the blade bar 9 is inserted into the inner ring 5A of the pair of bearings 5 so as to be freely inserted and removed, and the blade bar 9 is press-fitted and locked by the O-ring 8 so as to be pulled out. The blade rod 9 has a round bar shape, and the tip of the blade portion 9A formed at the tip thereof is formed at a position slightly displaced from the axis. Further, since the rear end portion 9B of the blade rod 9 is formed in a conical shape, the rotation of the blade rod 9 is not impaired when it is received by the push rod 10 described later. The push rod 10 is screwed into the inner shaft 2 so that its longitudinal position can be adjusted, and the O-ring 11 provided in the groove 10A of the push rod 10 is pressed against the inner surface 2A of the inner shaft 2 to screw the push rod 10 Loosening is prevented. The conical rear end portion 9B of the blade rod 9 is brought into contact with the front end of the push rod 10, and the protruding length of the blade portion 9A of the blade rod 9 is adjusted by adjusting the longitudinal position of the push rod 10.

When this cutting pen is mounted on an automatic cutting plotter or the like and moved in the XY directions, the cutting pen is freely rotated so that the blade tip always faces in the traveling direction, and cutting can be performed.

2 and 3 show another embodiment of the present invention, in which a fixture 12 is interposed between the inner rings 5A of a pair of bearings 5 incorporated in the inner shaft 2, and the fixture 12 is attached to the inner ring 5A. A groove 12A is formed so that a part thereof penetrates inward, and an O-ring 8 is fitted into the groove 12A. Therefore, a part of the O-ring 8 protrudes inward from the penetrating portion of the recessed groove 12A and comes into pressure contact with the blade 9.

Although the above embodiment has been described as an optimum embodiment, the present invention is not limited to the above embodiment, and the members such as the tip metal, the outer shaft and the inner shaft are integrated with other members. It is also possible to configure the configuration, and conversely, the configuration divided into a plurality of members does not impair the purpose of the present invention.

[0009]

[Effect of device]

 As described above, the present invention is characterized in that the fixture is mounted between the inner rings of the pair of bearings, and the O-ring is provided on the fixture. Therefore, the O-ring is attached in a state in which it has an appropriate elastic force without being compressed, and the blade bar press-fitted and locked in the O-ring can be easily pulled out or inserted and replaced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a cutting pen of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Outer shaft 5 Bearing 5A Inner ring of bearing 5 8 O-ring 9 Blade rod 9A Blade portion of blade rod 9B Rear end portion of blade rod 10 Push rod

Claims (1)

[Scope of utility model registration request] 1. An outer shaft, a blade rod that is rotatably built around the outer shaft around an axis line, and has a blade portion at the tip of a rod-shaped body, and a cone-shaped rear end portion of the blade rod. In a cutting pen consisting of a push rod connected to a shaft, a pair of bearings is built in the outer shaft directly or through another member, and the blade bar is inserted into and removed from the inner ring of the pair of bearings,
A cutting pen, wherein a fixture is provided between the inner rings of a pair of bearings, and an O-ring attached to the fixture is used to press-fit and lock the blade bar so that the blade can be pulled out.