JP2004124410A - Lock for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase strength in the axial direction of a cylinder lock in a lock for a bicycle to prevent picking and facilitate its manufacturing. <P>SOLUTION: Yarn number count holes 3 formed with a pin receive hole 4 and a guide hole 5 are formed in both side faces of a cylinder 2 at an adequate interval in the axial direction and by opposing each other in the diametral direction. An insertion hole 6 for a key is formed by crossing a shaft core of the cylinder orthogonally. A yarn number count pin 9 provided with a head 7 and a shaft 8 is play-fitted into each yarn number count hole 3. A slide guide hole 10 corresponding to each yarn number count hole and yarn number count pin is formed in a cylinder case 1 in which the cylinder is fitted to fit a spring 11 and a cylindrical spring receive seat 12. In a locked state, the inner end of each yarn number count pin faces the insertion hole for the key, and the spring receive seat 12 is positioned on the rotating contraposition face 13 of the cylinder case and the cylinder to lock the cylinder to prevent its rotation. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to a bicycle lock, in which a cylinder incorporated into a lock body as a lock mechanism is fitted with a count pin having a head and a shaft instead of a plate tumbler piece, and is in a locked position so as to prevent rotation of the cylinder. A key pin is provided with a lock that can be unlocked by inserting a plate key with recesses on both front and back sides, thereby maintaining a strong locked state and making it difficult for illegal unlocking. It is.
[0002]
[Prior art]
Conventionally, a cylinder lock mechanism incorporated in a lock body generally uses a cylinder in which a plurality of plate tumbler pieces are fitted so as to be able to move up and down, and a key that has unevenness on both side edges of a flat plate is used. (For example, see Patent Documents 1, 2, 3, and 4).
In order to make it more difficult to detect the locked state of the plate tumbler fitted to the cylinder from outside, the plate tumbler is fitted alternately from both sides in the diameter direction. There is a request (for example, see Patent Document 5).
[0003]
[Patent Document 1]
JP-A-2000-352235 (page 1, FIG. 1)
[Patent Document 2]
JP-A-2002-21401 (page 1, FIG. 1)
[Patent Document 3]
JP-A-2002-47847 (page 1, FIG. 1)
[Patent Document 4]
JP 2001-234648 A (page 1, FIG. 1)
[Patent Document 5]
JP-A-2002-276214 (page 1, FIG. 1)
[0004]
[Problems to be solved by the invention]
The bicycle lock incorporating the cylinder lock mechanism of the prior application is a technology that reduces the strength in the axial direction or is easy to pick because a large number of plate tumblers are fitted perpendicular to the axial direction of the cylinder. There is a problem that the cost increases.
In view of the above, the problem to be solved by the present invention is to enhance the strength of the cylinder in the axial direction so that it is difficult to pick the cylinder, to make it easier to manufacture, and to reduce the cost.
[0005]
[Means for Solving the Problems]
Therefore, the present invention, in order to solve the above problems, on both sides facing each other in the diametric direction of the cylinder, at an appropriate interval along the axial direction, and so as to alternately face in the diametric direction, An appropriate number of count holes communicating the pin receiving hole and the guide hole are drilled, and a substantially flat plate key insertion hole is provided at the axis of the cylinder so as to be orthogonal to each of the count holes, and in this insertion hole, While the inner ends of the guide holes of the respective count holes are alternately opened from the facing direction, each count hole is integrally provided with a head fitting into the pin receiving hole and a shaft fitting into the guide hole. The number pins are loosely fitted, and a plurality of sliding guide holes corresponding to the number holes and the number pins are provided in a cylinder case in which the cylinder is rotatably fitted, and a spring is provided in each sliding guide hole. And connected to the inner end of this spring The bottom cylindrical spring receiving seat is pressed against the head of each count pin to urge each count pin toward the axis, and in the locked state, the inner end of each count pin is biased by the spring. The key for allowing the spring to be exposed to the insertion hole of the key and the spring receiving seat to be positioned on the rotation opposing surface of the cylinder case and the cylinder to lock the cylinder so that it cannot rotate, and to unlock this locked state, A recess having a predetermined depth is provided on each of the front and back surfaces for each pitch interval of the count portion, and the key is inserted into the insertion hole, and each spring receiving seat is placed on the rotating counterpart surface of the cylinder case. An object of the present invention is to provide a bicycle lock configured to allow rotation of the cylinder by pushing back the head of the pin to the rotation-facing surface of the cylinder.
[0006]
The bicycle lock according to the present invention configured as described above can be formed in a round hole that is easier to work than a hole for fitting a plate tumbler piece provided in a conventional cylinder, so that it is advantageous in manufacturing and cost can be reduced.
In addition, the bicycle lock according to the present invention, in which the inner end of the count pin is exposed to the insertion hole, as compared to the engagement portion with the key provided on each plate tumbler piece so as to project to the insertion hole of the key. And the key engagement portion has relatively high strength. Also, the picking operation using the key insertion hole becomes difficult to find as compared with the case of the conventional plate tumbler piece, and it is difficult to illegally open the lock.
As described above, the present invention has solved the above-mentioned problems.
[0007]
On the front and back surfaces of the key, a concave portion which is located on an eccentric line parallel to the center line and engages with the count pin is provided at the same position, while the key insertion hole provided on the cylinder side corresponds to the eccentricity of the eccentric line. When one side of the key is formed wide and one side of the key is inserted into the insertion hole, the recess on the other side is at the eccentric position and deviates from the position of the count pin (the center position of the cylinder). When the surface is inserted, a concave portion is provided at the same eccentric position on both front and back surfaces so that the concave portion on the one surface is at the eccentric position and deviates from the protruding position of the count pin, so that the key can be used reversibly. According to the second aspect of the present invention, when the key is inserted into the keyhole, it can be used casually without considering the insertion surface of the key having the concave portion that engages with the count pin. Use of cases It is suitable to.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
1 is a partially cutaway longitudinal sectional view showing an unlocked state of a cylinder lock mechanism according to the present invention, FIG. 2 is a plan view of a key according to the present invention, FIG. 3 is a rear view of the key, and FIG. FIG. 5 is a vertical cross-sectional view of the cylinder, FIG. 6 is a bottom view, FIG. 7 is a vertical cross-sectional view of the cylinder lock mechanism, and FIG. FIG. 9 is a front view showing the state, and FIG.
[0009]
In the figure, 1 is a cylinder case, 2 is a cylinder which is rotatably fitted into the cylinder case 1, and 3 is on both sides (upper and lower surfaces in the figure) opposed in the diameter direction of the cylinder along the axial direction of the cylinder. A slightly larger diameter pin receiving hole 4 and a relatively small diameter communicating with the inner end of the pin receiving hole 4 are provided at appropriate intervals. The count holes 6 formed by the guide holes 5 are orthogonal to the respective count holes 3 and are provided substantially eccentrically with respect to the axis of the cylinder 2 as shown in FIG. This is a key insertion hole in which the inner end of the hole 5 is alternately opened from the opposite direction (up and down in the figure).
[0010]
As shown in FIG. 1 and FIG. 7, a head 7 formed in a spherical shape is fitted into the pin receiving hole 4 in each of the count holes 3, and is integrally connected to the head 7 so that the inner end has a substantially conical shape. Count pins 9 in which the formed shaft portions 8 are fitted into the guide holes 5 are slidably fitted respectively.
In this embodiment, while the depth of each pin receiving hole 4 provided on the cylinder side is fixed and the length of the head 7 of each count pin 9 is changed, the count in the cylinder lock mechanism is set. In implementing the present invention, the length of the head 7 may be fixed and the pin number may be set by changing the depth of the pin receiving hole 4.
[0011]
On the other hand, in the cylinder case 1 in which the cylinder 2 is rotatably fitted, the same number of sliding guide holes 10 respectively corresponding to the numbered holes 3 and the numbered pins 9 are provided. A coiled spring 11 is fitted with a bottomed cylindrical spring receiving seat 12 connected to the inner end, and the head of each count pin 9 is attached to the spring 11 via the spring receiving seat 12 in each sliding guide hole 10. The portion 7 is biased toward the axis.
The count pin 9, the sliding guide hole 10, the pin receiving hole 4 and the count hole 3 are each formed in a circular cross section.
[0012]
When the key is not inserted into the insertion hole 6, each count pin 9 is urged by the spring 11, and the inside of the shaft portion 8 is adjusted according to the fitting depth of the head 7 and the slide guide hole 10. The conical tip provided at the end faces the insertion hole 6. At this time, the bottomed cylindrical spring receiving seat 12 which is in pressure contact with the head 7 of each count pin 9 has its side face positioned on the rotating even face 13 between the cylinder case 1 and the cylinder 2. The locked state of preventing rotation of the cylinder 2 is maintained.
[0013]
As shown in FIGS. 2 and 3, the key 14 for unlocking the locked state is arranged on an incline L ′, L ″ parallel to the center line L of the key 14 at intervals corresponding to the pitch interval of the count pins 9. A substantially conical recess 15 is provided so that it can be used reversibly.
That is, the recesses 15a, b, c, and d on the eccentric line L 'of the surface of the key 14 shown in the plan view (FIG. 2) correspond to the upper count pins 9 as shown in the sectional view of FIG. , The recesses 15e, f, g on the eccentric line L 'on the back surface (FIG. 3) correspond to the lower count pins 9 shown in the sectional view of FIG. When the key 14 is inserted inside the insertion hole 6 corresponding to the upper and lower count pins 9 when the key 14 is used upside down, as shown in FIG. 9 is pushed back against the spring 11.
When each count pin 9 is pushed back as described above, the bottomed cylindrical spring receiving seat 12 that was located on the rotating mating face 13 at the time of locking, and the head 7 of each count pin 9 in the sliding guide hole 10. Face each other on the rotating paired face 13 to enable relative rotation of the cylinder case 1 and the cylinder 2 (unlocking is enabled).
[0014]
As shown in the embodiment, when the end face of the head 7 of each count pin 9 is formed in a spherical surface and the bottom of the spring receiving seat 12 is rounded, the head 7 and the sliding guide hole at the time of the unlocking rotation operation are provided. The difference with 10 can be made smoothly. Further, when the inner end of the shaft portion 8 of each count pin 9 and the concave portion 15 of the key 14 are formed in a substantially conical shape, and the front end portion of the key 14 is formed on both front and back surfaces as shown in the figure, the operation of inserting and removing the key 14 is performed. And the operation of the count pin 9 corresponding thereto is performed smoothly.
[0015]
In the drawing, reference numeral 16 denotes a stopper pin fitted to the cylinder case 1 and the cylinder 2 to prevent the cylinder 2 from coming off, 17 denotes a guide groove of the pin 16 provided on the cylinder 2 side, 18 denotes a knob of the key 14, 19 A cover member covers a sliding guide hole 10 formed in the cylinder 1.
In this embodiment, the key 14 is provided with concave portions 15 on the front and back surfaces to be engaged with the count pins 9, respectively, so that it is not necessary to check the front and back of the key, and the unlocking operation can be performed casually. Inconvenience when hurrying or when the bicycle parking place is dark can be eliminated.
[0016]
As described above, when the count pins 9 are fitted to both side surfaces of the cylinder 2 as in this embodiment, a firm bicycle lock can be manufactured with a reduced pitch interval between the count pins. Further, it is possible to provide a bicycle lock in which an illegal unlocking operation is difficult.
[0017]
【The invention's effect】
The bicycle lock of the present invention configured as described above and used as described above uses a count pin instead of a plate tumbler piece, so that it is easy to manufacture and a strong and easy-to-operate bicycle lock. It is extremely useful, as it can provide tablets.
[Brief description of the drawings]
FIG. 1 is a partially cutaway longitudinal sectional view showing an unlocked state of a cylinder lock mechanism according to the present invention. FIG. 2 is a plan view of a key according to the present invention. FIG. FIG. 4 is a plan view of the cylinder. FIG. 5 is a longitudinal sectional view of the cylinder. FIG. 6 is a bottom view. FIG. 7 is a cylinder lock. FIG. 8 is a front view showing a state in which a cylinder lock mechanism is incorporated in a lock body of a bicycle lock;
FIG. 9 is a left side view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder case 2 Cylinder 3 number hole 4 Pin receiving hole 5 Guide hole 6 Key insertion hole 7 Head 8 Shaft 9 Number pin 10 Sliding guide hole 11 Spring 12 Spring receiving seat 13 Rotation counterpart surface 14 Key 15 Recess 16 Stopper Pin 17 Guide groove 18 Knob 19 Cover member L Center line L ', L "Eccentric line

Claims (2)

Appropriate number of pin receiving holes and guide holes communicating with each other in the diametric direction of the cylinder at appropriate intervals along the axial direction, and alternately opposing each other in the diametric direction. A count hole is drilled, and a plate key insertion hole is provided in a substantially flat shape at the axis of the cylinder so as to be orthogonal to each of the count holes, and the inner end of the guide hole of each count hole is opposed to this insertion hole from the opposite direction. While being alternately opened, a count pin having a head fitted into the pin receiving hole and a shaft fitted into the guide hole is loosely fitted into each count hole, and the cylinder is rotatable. A plurality of sliding guide holes respectively corresponding to the above-mentioned numbered holes and the numbered pins are provided in a cylinder case that fits into the cylinder case, and a spring is fitted into each of the sliding guide holes and connected to the inner end of the spring. Attach the bottom cylindrical spring seat to the head of each of the above count pins. In contact with each other, each count pin is urged toward the axis.In the locked state, the inner end of each count pin is exposed to the key insertion hole by the bias of the spring, and the spring receiving seat is closed. The key for unlocking the locked state by positioning the cylinder in such a way that the cylinder case and the cylinder rotate against each other and locking the cylinder in a non-rotatable manner was provided with a predetermined depth for each pitch interval of the above-mentioned count part. By providing recesses on both the front and back surfaces, inserting the keys into the insertion holes, and pushing back the spring receiving seats to the rotating and even surfaces of the cylinder case and the heads of the count pins to the rotating and even surfaces of the cylinder, respectively. A bicycle lock configured to allow rotation of the cylinder. On the eccentric line parallel to the center line, the key is provided with the concave portion engaging with the count pin on both front and back surfaces, while the key insertion hole provided on the cylinder has one side corresponding to the eccentricity of the eccentric line. When one surface of the key is inserted into the insertion hole, the eccentric concave portion on the other surface is deviated from the position of the count pin (the center position of the cylinder), and when the key is reversed and the other surface is inserted, 2. The bicycle lock according to claim 1, wherein a concave portion is provided at the same eccentric position on both front and rear surfaces so that the concave portion on one surface deviates from the position of the count pin, so that the key can be used reversibly.

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