JPH0639388U - Cutting pen - Google Patents

Abstract

(57) [Summary] [Structure] The blade rod 8 is incorporated in the outer shaft 1 so as to be rotatable around its axis. A rear end portion 8B of the blade rod 8 is received by a push rod 9 connected to the outer shaft 1. A pair of bearings 5 is built in the outer shaft 1, and a blade bar 8 is inserted into and removed from the inner ring 5B of the pair of bearings 5. Further, a tubular locking member 7 is provided between the inner rings 5B of the pair of bearings 5, and the blade portion 8 is press-fitted and locked by the fitting portion 7A of the locking member 7 so as to be pulled out. [Effect] There is no risk of the locking tool 7 tilting or deviating from the center, and there is no risk of the insertion of the blade rod 8 being blocked by the locking tool 7. Further, the locking force of the fitting portion 7A of the locking tool 7 with respect to the blade bar 8 is not affected by the dimensional error at the time of attachment, and can always be press-fitted and locked with an appropriate force.

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]

 Conventionally, a cutting pen having an O-ring interposed between the inner rings of a pair of bearings has been known as a structure for easily and exchangeably fixing and supporting a blade.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional type, when the O-ring is strongly clamped between the bearings due to variations in dimensions, the elasticity of the O-ring is lost, and the holding force of the blade is extremely strong. If it becomes weak, the O-ring may bend to near the center, making it difficult to insert the blade. 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 is built in the outer shaft directly or via another member, and the blade bar is inserted into and removed from the inner ring of the pair of bearings. A tubular locking tool is provided between the pair of bearings, and the locking tool is integrally or separately provided to form a fitting portion, and the fitting portion allows the blade bar to be pulled out by press fitting. Stop.

[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 portion of the inner shaft 2, a guide member 6 is sandwiched between outer rings 5A of the bearings 5, and an inner hole 6A of the guide member 6 is provided between inner rings 5B of the bear ring 5. The tubular locking tool 7 guided by is loosely fitted. A fitting portion 7A that protrudes inward is formed at a substantially middle portion of the locking tool 7. Further, the blade bar 8 is pulled out and inserted into the inner ring 5B of the pair of bearings 5 and inserted into the inner ring 5B, and the blade bar 8 is pulled out to the fitting portion 7A of the locking tool 7 as shown in FIGS. It can be press-fitted and locked. The blade rod 8 has a round bar shape, and the tip of the blade portion 8A formed at the tip thereof is formed at a position slightly displaced from the axis. Further, the rear end portion 8B of the blade rod 8 is formed in a conical shape. A push rod 9 is screwed into the inner shaft 2 so that its longitudinal position can be adjusted, and a bearing 11 is held by a step portion 10A of a support tool 10 and a front end of the push rod 9 which are press-fitted into the front portion of the push rod 9. The rear portion 12A of the receiving member 12 is inserted into the inner ring 11A of the bearing 11. The front portion 12B of the receiving tool 12 is covered by the supporting tool 10, and the rear end portion 8B of the blade 8 is guided by the mortar-shaped front end 10B of the supporting tool 10 and abuts against the mortar-shaped front end 12C of the receiving tool 12. To be done. Further, the blade portion 8A of the blade rod 8 is configured to project from the front end of the outer shaft 1. Therefore, since the locking tool 7 is guided by the inner hole 6A of the guide member 6 and positioned substantially in the central portion, there is a risk that the locking tool 7 is attached at an angle or is compressed and deformed for mounting. There is no concern that the insertion of the blade 8 will be obstructed by the locking tool 7.

FIGS. 4, 5, and 6 show another embodiment of a locking tool that is loosely fitted between the inner races 5B of the bearing 5, in which the relative position of the substantially intermediate portion of the cylindrical locking tool 107 is shown. The opening 107B is formed at the position, and the C-shaped fitting portion 107C is externally fitted to the locking member 107. Moreover, the end of the fitting portion 107C is projected inward from the opening 107B, and the blade bar 8 inserted in the locking tool 107 is press-fitted and locked by the end of the fitting portion 107C so as to be pulled out. Is.

FIG. 7 and FIG. 8 show another embodiment of a locking tool that is loosely fitted between the inner races 5B of the bearing 5. The cylindrical locking tool 207 has a rear end from the middle part. It is divided into several parts by a kerf, and the divided part 207D is bent inward. The blade 207 is press-fitted and locked by a piece 207D of the locking tool 207 so that it can be pulled out.

[0008] In all of the above embodiments, the locking tool is guided by the guide member, but the present invention is not limited to the above embodiment, and as shown in Fig. 9, the inner ring of the bearing 5 is It is also possible to simply arrange the locking tool 7 between the 5Bs.

Further, the members such as the tip metal, the shaft cylinder, and the inner shaft can be integrally formed with other members, and conversely, the members such as the front metal, the shaft cylinder, the inner shaft, and the push rod can be formed into a plurality of members. Even if it is divided into two parts, it does not impair the purpose of the present invention.

[0010]

[Effect of device]

 As described above, according to the present invention, the tubular locking member is guided to the substantially central portion by the guide member and is installed by being arranged between the inner rings of the bearings, so that the locking member does not tilt or compressively deform. The feature is that it is attached. Therefore, there is no risk of the locking tool tilting or deviating from the center, and there is no risk of the insertion of the blade being hindered by the locking tool. Further, the locking force of the fitting part of the locking tool with respect to the blade bar is not affected by the dimensional error at the time of mounting, and the press-fitting locking can always be performed with an appropriate force.

[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 a locking tool of the cutting pen in the embodiment of FIG.

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

FIG. 4 is a sectional view showing another embodiment of the present invention.

5 is a cross-sectional view showing a locking tool of the cutting pen of the embodiment of FIG.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a sectional view showing another embodiment of the present invention.

8 is a cross-sectional view showing a locking tool of the cutting pen of the embodiment of FIG.

FIG. 9 is a cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Outer shaft 5 Bearing 5B Inner ring of bearing 5 7 Locking tool 8 Blade bar 8A Blade part 8B of blade bar 8B Rear end part of the blade bar 9 Push rod 107 Locking tool 107C Fitting part of locking tool 107 207 Locking Ingredient

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 a tip of a rod-shaped body, and a rear end portion of the blade rod, and is connected to the outer shaft. In a cutting pen including a push rod, a pair of bearings is built in the outer shaft directly or through another member, and the blade rod is inserted into and removed from the inner ring of the pair of bearings, and the pair of bearings is inserted. A tubular locking member is provided between the inner rings of the above, and the locking member is integrally or separately provided to form a fitting portion, and the blade bar is press-fitted and locked by the fitting portion so that the blade bar can be pulled out. A cutting pen.