JP4459849B2 - Unlock key - Google Patents

Description

  The present invention relates to an unlock key.

  As an unlocking key that prevents malfunction due to clogging of a movable body incorporated in the blade unit 1 in order to make it difficult to duplicate a key using a copying tool or the like, the one described in Patent Document 1 is known. Yes. In this conventional example, the movable body (embedding element) is formed in a three-step stepped pin shape in which a flange having the largest diameter is arranged at the center portion, and is accommodated in an accommodation hole on the blade portion (shaft portion) side. .

  The accommodation hole is formed in a three-step stepped hole shape corresponding to the movable body, and the movable body is movably held by setting a movable space of the flange at the maximum diameter portion corresponding to the flange.

The small-diameter shafts at both ends of the movable body are always in sliding contact with the inner peripheral wall surface of the corresponding hole of the accommodation hole regardless of the movement position in the state where it is mounted in the accommodation hole, and the entrapment of dust or the like in the movable area is prevented.
Japanese Patent No. 2905351

  However, since the above-described conventional example uses the peripheral wall of the small-diameter portion of the movable body and the inner peripheral wall surface of the accommodation hole as the sealing surface, there is a problem that it takes a number of manufacturing steps. In other words, in order to accommodate the movable body on the blade side so as not to fall off, after the movable body is accommodated by forming a two-stage stepped hole corresponding to the flange and one small diameter shaft in the blade part, It is necessary to close the open end of the part by appropriate means.

  Since this closed end side is expected to have a sealing function between the peripheral edge of the small-diameter shaft of the movable body, the closing means is required to be capable of dimensional management in consideration of the shaft diameter of the small-diameter shaft. As a result, as shown in the conventional example, it is necessary to close the open end using a ring-shaped member.

  In this way, to make the surface the same as the peripheral surface so that the relatively large-diameter hole is tightly closed by another member and the closed surface does not feel uncomfortable when inserted into the cylinder lock. , Requires a lot of man-hours.

  The present invention has been made to solve the above drawbacks, and an object of the present invention is to provide an unlocking key that is easy to manufacture and that can effectively prevent malfunction of a movable part due to dust or the like.

According to the present invention, the object is
This is an unlocking key that guides the tumbler 5 on the cylinder lock 4 side that enters from the opening on both sides by the movable body 3 that is movably accommodated in the accommodation holes 2 opened on the front and back of the blade portion 1 to a predetermined unlocking position. And
The accommodation hole 2 has one end reduced in diameter,
The movable body 3 is formed of divided halves 7 facing the reduced diameter portion 6 and the open end, and springs 8 for applying a biasing force in the separation direction to the divided halves 7,
In addition, this is achieved by providing an unlocking key in which the open end of the accommodation hole 2 is crimped to prevent the movable body 3 from falling off.

  The cylinder lock 4 is formed by rotatably inserting a plug 15 into the cylinder case 14, and the locking / unlocking state of the cylinder lock 4 is determined by the position of the tumbler 5 in the plug 15. For example, the end of the tumbler 5 on the cylinder case 14 side is located at the rotational boundary between the plug 15 and the cylinder case 14, or the recess formed in the tumbler 5 is opposed to the side bar located on the rotational boundary. By providing a retreat space into the plug 15 in the side bar, the unlocked state is obtained.

  The unlocking key has a movable body 3 accommodated in the blade portion 1 and an appropriate number of unlocking cord forming recesses 1a formed on the surface of the blade portion 1 as required. The position of the corresponding tumbler 5 in the plug 15 is determined in the state of being inserted into the portion 15a.

  The determination of the tumbler position by the unlocking code forming recess 1a is performed by pressing the tip of the corresponding tumbler 5 against the unlocking code forming recess 1a. On the other hand, a pair of tumblers 5 for the movable body 3 are provided so as to sandwich the movable body 3 from the front and back of the blade portion 1. The pair of tumblers 5 and 5 do not need to be arranged in a straight line as long as both are in pressure contact with the movable body 3, and as will be described in detail later, the movable body 3 is one of these tumblers. 5 is pushed to the end of the stroke.

  The movable body 3 enters the plug 15 beyond the key insertion portion 15 a at the movement stroke end position, and the position corresponds to the unlocked position of each tumbler 5. If protrusions are formed in advance on the blade portion 1 instead of the movable body 3 so that the tumbler 5 is in the unlocked position, the blade portion 1 cannot be inserted into the key insertion portion 15a. Key duplication using etc. becomes impossible.

  The accommodation hole 2 opened in the blade portion 1 for accommodating the movable body 3 is reduced in diameter at one end to restrict the dropout of the movable body 3 in the direction, and the open end accommodates the movable body 3. Thereafter, caulking is performed to prevent the movable body 3 from falling off.

  The movable body 3 is divided into a split half 7 facing the reduced diameter portion 6 and a split half 7 facing the crimping portion 13, and one of the split halves 7 urged in the separation direction by a spring 8. Is in pressure contact with the wall surface of the reduced diameter portion 6 and the other is in pressure contact with the crimped portion 13. In this state, that is, in a state where the unlocking key is not inserted into the plug 15, the inside of the receiving hole 2 is sealed by the front end surface of each divided half body 7. During this time, dust or the like enters the accommodation hole 2 and causes no malfunction of the movable body 3.

  In the present invention, which exerts a biasing force in the protruding direction on the divided half body 7 and presses the divided half body 7 against the assumed seal surface by using the biasing force, the sealing hole capable of preventing the entry of dust is provided. No dimensional accuracy on the closing side of 2 is required. As a result, since the closure of the accommodation hole 2 can be performed by caulking, manufacturing efficiency is improved.

  Further, the split half body 7 approaches and abuts against the reaction force of the spring 8 when a push-up force from one tumbler 5 is applied. This function is ensured.

In addition, other unlocking keys using sealing inside the receiving hole 2 by pressure contact are:
This is an unlocking key that guides the tumbler 5 on the cylinder lock 4 side that enters from the opening on both sides by the movable body 3 that is movably accommodated in the accommodation holes 2 opened on the front and back of the blade portion 1 to a predetermined unlocking position. And
The movable body 3 has a large-diameter head 9 at one end and a small-diameter shaft portion 10 at the other end, and is formed into a stepped pin shape.
The accommodating hole 2 accommodates a small-diameter portion 11 through which the small-diameter shaft portion 10 is inserted while maintaining a sliding contact state, and a large-diameter head portion 9. The open end is closed by caulking to prevent the movable body 3 from falling off. A large-diameter portion 12 and a stepped hole shape,
In addition, the large-diameter head 9 of the movable body 3 is configured to be urged by the spring 8 and press-contacted with the crimping portion 13.

  In this case, the movable body 3 includes the small-diameter shaft portion 10 inserted into the small-diameter portion 11 of the accommodation hole 2 and is integrally formed as a whole, and is urged toward the caulking portion 13 side. The seal on the small-diameter shaft portion 10 side is achieved by maintaining the insertion state of the small-diameter shaft portion 10 into the small-diameter portion 11 regardless of the moving position of the movable body 3, and the seal on the caulking portion 13 side is achieved. This is achieved by pressure contact with the portion 13.

  Since the formation of the small diameter portion 11 on the blade portion 1 can be performed by drilling from the large diameter portion 12 side, the dimensional control of the inner diameter is extremely easy. Even if sealing is performed using sliding contact with the wall surface, the production efficiency is not lowered.

  According to the present invention, it is easy to manufacture and it is possible to effectively prevent malfunction of the movable part due to dust or the like.

  As shown in FIG. 1, the unlocking key is formed of a metal plate, and includes a gripping head 1 b at one end of the blade portion 1. The blade portion 1 is provided with a plurality of unlocking cord forming recesses 1a and a plurality of insertion guide grooves 1c. As shown in FIG. 3, the blade portion 1 is formed in a point-symmetric shape with respect to the center of the cross section so that the front and back of the cylinder lock 4 can be reversed.

  An accommodation hole 2 is formed in the vicinity of the tip of the blade portion 1 to accommodate the movable body 3. As shown in FIG. 1B, the accommodation hole 2 can be formed by drilling from the front and back surfaces of the blade portion 1 toward the opposite surface side. The tool front end portion of the accommodation hole 2 is reduced in diameter, and dropping of the movable body 3 from the reduced diameter portion 6 is restricted. In this embodiment, a tapered surface is formed on the inner wall of the reduced diameter portion 6.

  On the other hand, the movable body 3 is formed of two divided halves 7 and a compression spring 8 interposed between the divided halves 7. As shown in FIG. 1B, one of the divided halves 7 (hereinafter referred to as “front-side divided half 7A”) faces the reduced diameter portion 6 of the housing hole 2, and the other (hereinafter referred to as “rear-side divided half-half”). The body 7B ") faces the open end of the receiving hole 2. At the front end of the front divided half 7A and the rear end of the rear divided half 7B, a sliding contact block portion 7a that is in sliding contact with the inner peripheral wall of the accommodation hole 2 is formed, and a tapered surface 7b is formed at the tip of the sliding contact block portion 7a. Is formed.

  The tapered surface 7b of the front side divided half 7A is formed on an inclined surface substantially the same as the tapered surface of the inner wall of the reduced diameter portion 6, and the tapered surface 7b of the rear side divided half 7B is in contact with a caulking portion 13 described later. It is formed on an inclined surface to such an extent that a gap is not generated as much as possible.

  Further, one of the divided halves 7 (the front divided half 7A in the illustrated embodiment) is provided with a guide projection 7c, and is slidably fitted into a guide recess 7d formed on the other half. To prevent lateral displacement. Further, stopper portions 7e are formed at the opposing positions in both divided halves 7. The height of the movable body 3 in a state where the stopper portions 7e are in contact with each other so as not to hinder the insertion of the unlocking key into the key insertion portion 15a is the height dimension of the key insertion portion 15a of the plug 15 (see FIG. 3). ) And smaller than that.

  After the movable body 3 configured as described above is inserted into the receiving hole 2 as shown in the upper side of FIG. 1B, the open end of the receiving hole 2 is crimped as shown in the lower side. To prevent it from coming off. In this state, the two split halves 7 of the movable body 3 are separated in the separation direction by the compression springs 8, and the tapered surfaces 7b of the split halves 7 are in pressure contact with the reduced diameter portion 6 and the crimping portion 13, and the contact portions Intrusion of dust or the like from the inside into the accommodation hole 2 is prevented.

  The operation of the movable body 3 will be described with reference to FIGS. First, the plug 15 is fitted with a pair of tumblers 5 and 5 that face the movable body 3 when the unlocking key is inserted to a predetermined depth. On the other hand, on the cylinder case 14 side, a drive pin 14a arranged in a straight line with the tumbler 5 at the neutral rotation position of the plug 15 shown in FIG. The drive pin 14a is urged in the direction of the plug 15 by the tumbler spring 14b. When the unlock key is not inserted, the tumbler 5 is pushed by the drive pin 14a as shown in FIG. Jump out into the insertion portion 15a. The tumbler spring 14b disposed below has a larger spring force than the tumbler spring 14b disposed above.

  In this state, both the drive pins 14a have entered the plug 15 beyond the rotation boundary (SL) between the plug 15 and the cylinder case 14, and therefore the rotation operation to the plug 15 is prohibited. Thereafter, when the unlocking key is inserted into the key insertion portion 15a, the space between the tumblers 5 and 5 is expanded by the inclined surface 1d formed at the tip of the unlocking key as shown in FIG. In the state where the unlocking key is inserted, as shown in FIG. 2B, the tumbler 5 is held at a position where the tip abuts against the side wall of the key insertion portion 15a. Even in this state, the locked state is maintained.

  When the unlocking key is further inserted to the insertion end position, the tumbler 5 matches the movable body 3 as shown in FIG. Due to the match with the tumbler 5, the movable body 3 is vertically sandwiched by the tip of the tumbler 5 from above and below, and the stopper portions 7 e abut against the reaction force of the compression spring 8 to have a minimum height dimension. Furthermore, as described above, since the tumbler spring 14b of the lower drive pin 14a is set stronger than the upper one, the movable body 3 can resist the upper tumbler 5 against the reaction force of the upper tumbler spring 14b. And the tapered surface 7a of the front-side divided half body 7A is in pressure contact with the inner wall surface of the reduced diameter portion 6.

  As shown in FIG. 3, when the movable body 3 occupies this position, the rear ends of the upper and lower tumblers 5 are simultaneously positioned at the rotation boundary of the plug 15, and the rotation operation to the plug 15 is allowed. Further, with the tapered surface 7a of the front divided half 7A being in pressure contact with the inner wall surface of the reduced diameter portion 6, the tip of the front side divided opposite 7A is held at a position higher than the bottom wall of the insertion guide groove 1c, and the key is inserted. This state cannot be formed in the blade portion 1 in advance because it has reached the inside of the plug 15 beyond the portion 15a.

  FIG. 4 shows another embodiment of the present invention. In this embodiment, the movable body 3 is integrally formed with a large-diameter head 9 at one end and a small-diameter shaft 10 at the other end. The housing hole 2 on the blade portion 1 side for housing the large diameter portion 12 capable of accommodating the large diameter head portion 9, the small diameter portion 11 into which the small diameter shaft portion 10 can be inserted, and the sliding stroke of the movable body 3. The compression spring 8 is mounted between the back surface of the large-diameter head 9 and the stepped portion of the receiving hole 2.

  The movable body 3 is mounted by inserting the small-diameter shaft portion 10 through the small-diameter portion 11, and the open end portion of the large-diameter portion 12 is reduced in diameter by caulking in order to prevent dropping. In this state, as shown in the upper side of FIG. 4, the tapered surface formed at the tip of the large-diameter head 9 is pressed against the back surface of the caulking portion 13 to prevent entry of dust and the like from the portion.

  At the same time, the small-diameter shaft portion 10 is kept inserted into the small-diameter portion 11 while the large-diameter head portion 9 is in pressure contact with the caulking portion 13, and entry of dust and the like from the portion is also prevented.

  When the movable body 3 matches the tumbler 5 in the plug 15, as shown on the lower side, the large-diameter head 9 side is pushed so that the back surface of the large-diameter head 9 abuts against the stopper surface. Moves and unlocks.

It is a figure which shows this invention, (a) is a top view, (b) is the 1B-1B sectional view taken on the line of (a). 3 is a cross-sectional view taken along the line 2A-2A in FIG. 3 showing the operation of the movable body. It is a figure which shows an unlocking state. It is sectional drawing of the cylinder lock in an unlocked state. It is sectional drawing which shows other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Blade part 2 Accommodating hole 3 Movable body 4 Cylinder lock 5 Tumbler 6 Reduced diameter part 7 Split half body 8 Spring 9 Large diameter head part 10 Small diameter shaft part 11 Small diameter part 12 Large diameter part 13 Caulking part

Claims (2)

An unlocking key for guiding a cylinder lock side tumbler entering from an opening on both sides to a predetermined unlocking position by a movable body that is movably accommodated in an accommodation hole established on the front and back of the blade part,
The accommodation hole is reduced in diameter at one end,
The movable body is formed of divided halves facing each of the reduced diameter portion and the open end, and a spring for applying a biasing force in the separation direction to each divided half,
And the unlocking key by which the open end of an accommodation hole is crimped and drop of a movable body is controlled. An unlocking key for guiding a cylinder lock side tumbler entering from an opening on both sides to a predetermined unlocking position by a movable body that is movably accommodated in an accommodation hole established on the front and back of the blade part,
The movable body is formed in a stepped pin shape with a large-diameter head at one end and a small-diameter shaft at the other end,
The accommodation hole includes a small diameter portion through which the small diameter shaft portion is inserted while maintaining a sliding contact state, and a large diameter portion in which the large diameter head is accommodated and the open end is closed by caulking to prevent the movable body from falling off. With a stepped hole shape,
And the large-diameter head of the movable body is an unlocking key that is urged by a spring and pressed against the caulking portion.

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