Three-clamping lock

Abstract

The utility model discloses a three-clamping lock which comprises an upper shell and a lower shell, a three-clamping reed is arranged between the upper shell and the lower shell, an eccentric wheel penetrates through the three-clamping reed, the three-clamping reed is provided with a first through hole matched with an eccentric part of the eccentric wheel, the upper shell is provided with a second through hole allowing the upper end of the eccentric wheel to penetrate out, and the lower shell is provided with a third through hole allowing the lower end of the eccentric wheel to be inserted in. A circle of limiting ring with the diameter larger than that of the second through hole is arranged on the outer circle of the eccentric wheel, a spring arranged on the lower portion of the eccentric wheel in a sleeving mode is arranged between the lower shell and the three-clamp reed, an arc part protruding outwards is arranged on the outer circle of the limiting ring, and a clamping block which is bent towards the interior of the upper shell and can block the arc part is arranged on one side of the second through hole. When the three-clamping-lock eccentric wheel is located at the unlocking position, one end of the arc portion abuts against one end of the clamping block, when the eccentric wheel is located at the locking position, the other end of the arc portion abuts against the other end of the clamping block, the eccentric wheel is prevented from rotating excessively or not rotating in place, it is guaranteed that the three-clamping-spring piece is located at the locking position, connection between a sectional material and a connecting plate is kept stable, the connecting plate is prevented from falling off, and safety is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lockset, concretely relates to a three-card lock. BACKGROUND

[0002] At present, the section bar of the display stand usually needs a large number of three-card locks to be connected, for example, the Chinese utility model patent with the application number 201420791008.X discloses a three-card lock, which comprises an upper shell, a lower shell matched with the upper shell, and an eccentric wheel installed on the upper shell, the upper shell and the lower shell form a lock shell, a three-card spring sheet is arranged in the lock shell, a hole matched with the eccentric wheel is arranged on the three-card spring sheet, the eccentric wheel comprises an upper cylindrical section, a lower cylindrical section concentric with the upper cylindrical section, and a middle cylindrical section arranged between the upper cylindrical section and the lower cylindrical section, a keyhole is arranged on the top of the upper cylindrical section, a through hole is arranged on the upper shell, the upper cylindrical section of the eccentric wheel is installed on the upper shell through the through hole, the lower cylindrical section is matched with the lower shell, a round hole matched with the middle cylindrical section of the eccentric wheel is arranged on the three-card spring sheet. The three-card lock rotates the eccentric wheel to drive the three-card spring sheet to move in the actual use process, so as to complete the locking or unlocking of the connecting plate and the section bar, since the three-card lock does not have a limiting structure for the eccentric wheel, the eccentric wheel is easy to rotate too much or not to rotate to the position, so that the connection between the section bar and the connecting plate is unstable, the connecting plate is easy to fall off, and a safety accident occurs. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiencies in the background art, the technical problem to be solved by the utility model is to provide a three-card lock which can give the eccentric wheel a limiting function and keep the connection between the section bar and the connecting plate stable.

[0004] To this end, the utility model adopts the following technical scheme:

[0005] A three-card lock, which comprises an upper shell and a lower shell, a three-card spring sheet is arranged between the upper shell and the lower shell, an eccentric wheel is arranged through the three-card spring sheet, the three-card spring sheet has a first through hole matched with the eccentric part of the eccentric wheel, the upper shell is provided with a second through hole through which the upper end of the eccentric wheel is arranged, the lower shell is provided with a third through hole into which the lower end of the eccentric wheel is inserted, the outer circle of the eccentric wheel is provided with a limiting ring with a diameter larger than that of the second through hole, a spring is arranged between the lower shell and the three-card spring sheet and sleeved on the lower part of the eccentric wheel, characterized in that: the outer circle of the limiting ring is provided with a circular arc part protruding outward, and a clamping block is arranged on one side of the second through hole and bent inward to the upper shell and can block the circular arc part.

[0006] Further, the front and rear sides of the lower shell are both provided with a first supporting block, the first supporting block has an inclined surface inclined downward from left to right, and the left end of the lower part of the three-card spring sheet has an arc surface part which can be abutted on the inclined surface.

[0007] Further, the upper left end of the upper shell and the left end of the lower shell are provided with openings, the left end of the upper shell is provided with two inwardly bent covers on the front and back sides, the upper and lower ends of the cover are inserted into the opening, the opening of the lower shell is provided with a second support block bent upward, the second support block has the same inclination as the inclined surface, and the left end of the second support block abuts against the inner wall of the cover, and the three clamping spring pieces can abut against the second support block.

[0008] Further, the upper end of the eccentric wheel is provided with a keyway, the upper end of the eccentric wheel on the left and right sides of the keyway is welded with two hinged seats, a half ring piece is hinged on the hinged seat, the outer circle of the half ring piece is flush with the upper part of the eccentric wheel, one of the half ring pieces is provided with an indication mark, and the outer side of the half ring piece is provided with a groove.

[0009] Further, the upper end surface of the eccentric wheel is embedded with a magnet aligned with the half ring piece, and the half ring piece is made of ferromagnetic material.

[0010] Further, the two half ring pieces are provided with operation holes, and the two operation holes are aligned with each other when the two half ring pieces stand up.

[0011] Further, the indication mark is a circular pit or an indication arrow.

[0012] Further, the lower shell is provided with a raised portion aligned with the lower part of the eccentric wheel, the third through hole is arranged on the raised portion, and the spring sleeve is arranged on the raised portion.

[0013] Further, the front and back sides of the lower shell are provided with a plurality of buckles, and the upper shell is provided with a buckle hole into which the buckle is inserted.

[0014] After the above technical scheme is adopted, when the eccentric wheel is in the unlocking position, one end of the arc portion abuts against one end of the clamping block, when the eccentric wheel is in the locking position, the other end of the arc portion abuts against the other end of the clamping block, the eccentric wheel is prevented from turning too much or not turning to the position, the three clamping spring pieces are ensured to be in the locking position, the connection between the profiled material and the connecting plate is kept stable, the connecting plate is prevented from falling off, and it is more safe. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model has the following drawings:

[0016] Figure 1 It is the structure schematic drawing of the utility model;

[0017] Figure 2 It is the structure explosion schematic drawing of the utility model;

[0018] Figure 3 It is the structure schematic drawing of another embodiment of the eccentric wheel in the utility model.

[0019] Mark No. : 1, upper shell; 2, lower shell; 3, three clamping spring piece; 4, eccentric wheel; 5, eccentric part; 6, first through hole; 7, second through hole; 8, third through hole; 9, limiting ring; 10, spring; 11, circular arc part; 12, clamping block; 13, first supporting block; 14, inclined surface; 15, arc surface part; 16, opening; 17, cover; 18, second supporting block; 19, keyway; 20, hinged seat; 21, half ring piece; 22, indicating mark; 24, magnet; 25, operation hole; 26, raised part; 27, buckle; 28, clamping hole. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0021] Referring to the drawings, the three clamping lock provided by the utility model comprises an upper shell 1 and a lower shell 2, a three clamping spring piece 3 is arranged between the upper shell 1 and the lower shell 2, the three clamping spring piece 3 is provided with an eccentric wheel 4, and the three clamping spring piece 3 is provided with a first through hole 6 matched with an eccentric part 5 of the eccentric wheel 4, the upper shell 1 is provided with a second through hole 7 through which the upper end of the eccentric wheel 4 passes, the lower shell 2 is provided with a third through hole 8 into which the lower end of the eccentric wheel 4 is inserted, the outer ring of the eccentric wheel 4 is provided with a limiting ring 9 with a diameter greater than that of the second through hole 7, a spring 10 is arranged between the lower shell 2 and the three clamping spring piece 3 and is sleeved on the lower part of the eccentric wheel 4, and the outer ring of the limiting ring 9 is provided with a circular arc part 11 protruding outward, one side of the second through hole 7 is provided with a clamping block 12 bent inward into the upper shell 1 and capable of blocking the circular arc part 11, the front and rear sides of the lower shell 2 are both provided with a first supporting block 13, the first supporting block 13 is provided with an inclined surface 14 inclined downward from left to right, the left lower part of the three clamping spring piece 3 is provided with an arc surface part 15 capable of abutting against the inclined surface 14, the left upper end of the upper shell 1 and the left end of the lower shell 2 are both provided with an opening 16, the left end of the upper shell 1 is provided with a cover 17 bent inward on the front and rear sides, the upper and lower ends of the cover 17 are inserted into the opening 16, the opening 16 of the lower shell 2 is provided with a second supporting block 18 bent upward, the second supporting block 18 is provided with the same inclination as the inclined surface 14, and the left end of the second supporting block 18 abuts against the inner wall of the cover 17, the three clamping spring piece 3 can abut against the second supporting block 18, the upper end center of the eccentric wheel 4 is provided with a keyway 19, the indicating mark 22 is a circular pit, the lower shell 2 is provided with a raised part 26 aligned with the lower part of the eccentric wheel 4, the third through hole 8 is arranged on the raised part 26, the spring 10 is sleeved on the raised part 26, the front and rear sides of the lower shell 2 are both provided with a plurality of buckles 27, and the upper shell 1 is provided with clamping holes 28 into which the buckles 27 are inserted.

[0022] In the embodiment, one end of the arc section 11 abuts against one end of the clamping block 12 when the eccentric wheel 4 is in the unlocking position, and the other end of the arc section 11 abuts against the other end of the clamping block 12 when the eccentric wheel 4 is in the locking position, preventing the eccentric wheel 4 from being turned too much or not enough, ensuring that the three clamping spring pieces 3 are in the locking position, keeping the connection of the profiled material and the connecting plate stable, preventing the connecting plate from falling off, and being safer; the arc section 15 can move along the inclined surface 14 of the first supporting block 13 and return, ensuring the working reliability of the three clamping spring pieces 3; the cover 17 is formed by bending the left end of the upper shell 1 inward from the front and rear sides and is inserted into the opening 16, not only making the three clamping lock more beautiful, but also providing support for the second supporting block 18, preventing the second supporting block 18 from deforming, the second supporting block 18 being provided with the same inclination as the inclined surface 14, being able to cooperate with the three clamping spring pieces 3, and ensuring the working reliability of the three clamping spring pieces 3, the inclined surface 14 and the second supporting block 18 being provided to prevent the first through hole 6 of the three clamping spring pieces 3 from being separated from the eccentric portion 5 of the eccentric wheel 4 during the operation process, and being able to keep the face of the star-shaped groove 19 (operated by a spanner) from being inclined during the locking process, facilitating operation; the provision of the indication mark 22 facilitates the user to understand the state of the three clamping lock, the raised portion 26 positions the spring 10 and prevents the spring 10 from being displaced, and the upper shell 1 and the lower shell 2 are connected through a plurality of buckles 27 and clamping holes 28, being better in structural stability and being detachable, facilitating later maintenance.

[0023] Referring to Figure 3 Fig. 2 is another embodiment of the eccentric wheel 4 in the utility model, the upper end of the eccentric wheel 4 on the left and right sides of the star-shaped groove 19 is provided with two hinged seats 20 welded thereon, a half ring piece 21 is hinged on the hinged seat 20, the outer circle of the half ring piece 21 is flush with the upper outer circle of the eccentric wheel 4, one of the half ring pieces 21 is provided with an indication mark 22, and a recess is provided on the outside of the half ring piece 21, a magnet 24 is embedded on the upper end surface of the eccentric wheel 4 and is aligned with the half ring piece 21, the half ring piece 21 is made of ferromagnetic material, and the two half ring pieces 21 are provided with operation holes 25, the two operation holes 25 are aligned with each other when the two half ring pieces 21 stand up, and the indication mark 22 is an indication arrow.

[0024] In the embodiment, the half ring piece 21 is attracted by the magnet 24 and is attached to the upper surface of the eccentric wheel 4 in the normal state, when the three clamping lock needs to be operated, the spanner is forgotten or the number of spanners is not enough, the half ring piece 21 is pried out through the recess, at this time, the two half ring pieces 21 can be clamped and rotated by hand or a tool such as pliers, to drive the eccentric wheel 4 to rotate, preventing the three clamping lock from being unable to be operated when the spanner is forgotten or the number of spanners is not enough, in addition, the operation holes 25 can pass through a stick-shaped object after the two half ring pieces 21 stand up, and the stick-shaped object is rotated to drive the eccentric wheel 4 to rotate, being more suitable, and the indication arrow facilitates the user to understand the state of the three clamping lock.

[0025] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A three-card lock, comprising an upper shell and a lower shell, wherein a three-card spring is provided between the upper shell and the lower shell, an eccentric wheel is inserted through the three-card spring, and the three-card spring has a first through hole that mates with the eccentric part of the eccentric wheel; the upper shell has a second through hole for the upper end of the eccentric wheel to pass through; the lower shell has a third through hole for the lower end of the eccentric wheel to be inserted; a limiting ring with a diameter larger than the diameter of the second through hole is provided around the outer ring of the eccentric wheel; and a spring is provided between the lower shell and the three-card spring, sleeved on the lower part of the eccentric wheel, characterized in that: The limiting ring outer circle is provided with a outward convex arc part, and the second through hole is provided with a clamping block which is upwardly bent and can block the arc part.

2. A triple throw lock as claimed in claim 1, characterized in that: The front and rear sides of the lower shell are provided with first supporting blocks, and the left end lower part of the three clamping spring sheets is provided with an arc surface part which can be abutted on the inclined surface.

3. A triple throw lock as claimed in claim 2, characterized in that: The left end of the upper shell and the left end of the lower shell are provided with openings, the left end of the upper shell is provided with two inwardly bent covers on the front and rear sides, the upper and lower ends of the covers are inserted into the openings, the opening of the lower shell is provided with a second supporting block which is upwardly bent, the second supporting block has the same inclination as the inclined surface, the left end of the second supporting block is abutted on the inner wall of the cover, and the three clamping spring sheets can be abutted on the second supporting block.

4. A triple catch as claimed in claim 2 or 3, characterised in that: The eccentric wheel upper end is provided with a plum blossom groove in the center, the eccentric wheel upper end on the left and right sides of the plum blossom groove is provided with two hinged seats which are welded, a half ring sheet is hinged on the hinged seat, the outer circle of the half ring sheet is flush with the upper part of the eccentric wheel, one of the half ring sheets is provided with an indication mark, and the outer side of the half ring sheet is provided with a groove.

5. A triple throw catch lock according to claim 4, wherein: The upper end surface of the eccentric wheel is embedded with a magnet which is aligned with the half ring sheet, and the half ring sheet is made of ferromagnetic material.

6. A triple throw latch according to claim 4, wherein: The two half ring sheets are provided with operation holes, and the two operation holes are aligned with each other when the two half ring sheets stand up.

7. A triple throw latch according to claim 4, wherein: The indication mark is a circular pit or an indication arrow.

8. A triple detent catch according to claim 4, wherein: The lower shell is provided with a bulge part which is aligned with the lower part of the eccentric wheel, the third through hole is arranged in the bulge part, and the spring sleeve is arranged in the bulge part.

9. A triple throw latch according to claim 4, wherein: The front and rear sides of the lower shell are provided with a plurality of buckles, and the upper shell is provided with a clamping hole in which the buckle is inserted. The front and rear sides of the lower shell are provided with a plurality of buckles, and the upper shell is provided with a clamping hole in which the buckle is inserted.

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