Locking spring for fixing quick connector and quick connector thereof

Abstract

The utility model relates to a locking spring for fixing a quick connector, which comprises a handle (10) positioned at the upper part of the locking spring; the elastic bridges (16) are positioned on the left and right sides of the locking springs; the fastening connecting legs (14) are positioned on the outer sides of the elastic bridges (16); the elastic bridge (16) and the handle (10) are integrally formed by a shielding wall (12), and a shielding wall slot (12b) is formed in the shielding wall (12) so as to guide the locking spring in the direction in which the locking spring is firmly connected to the quick connector.

Description

Technical Field

[0001] The utility model relates to a locking spring and a quick connector, in particular to a structure capable of monitoring the temporary fastening connection of a locking spring to a quick connector and a final fastening connection structure combined with end pieces. Background Art

[0002] The coupling device suitable for fluid pipelines should be able to maintain internal airtightness when the fluid is flowing, and the staff should be able to clearly identify the assembly status between the coupling connector and the connecting plug, and should effectively prevent separation or detachment caused by strong pulling force applied by external force in the assembled state.

[0003] When the coupling device is used for a high-pressure fuel line of a vehicle or a hydrogen / oxygen supply line of a fuel cell vehicle, the performance of maintaining internal airtightness, identifying the connector assembly state and maintaining the connector connection state must be reliably guaranteed. Although a structure must be formed to clearly identify from the outside whether the connection is tight, only attention is paid to the technical development of the fastening structure itself or the installation and removal of the locking spring.

[0004]

Prior technical literature

[0005] [Patent Literature]

[0006] (Patent Document) Korean registered patent KR 528,877B1 Utility Model Content

[0007] In view of the above situation, the utility model relates to a structure capable of monitoring a structure in which a locking spring is temporarily fastened to a quick connector and a final fastened connection structure according to the combination of end pieces.

[0008] An embodiment of the utility model is a locking spring for fixing a quick connector, which includes: a handle 10, which is located at the upper part of the locking spring; an elastic bridge 16, which is located on the left and right of the locking spring; a fastening connection leg 14, which is located on the outside of the elastic bridge 16; the elastic bridge 16 and the handle 10 are formed as a whole through a shielding wall 12, and a shielding wall slot 12b is formed in the shielding wall 12 to guide the locking spring in the direction of being fastened to the quick connector.

[0009] In addition, the first shielding wall protrusion 12a and the second shielding wall protrusion 12c form a step difference between each other on the left and right sides of the shielding wall slot 12b.

[0010] In addition, the bottom surfaces of the shielding wall slot 12b, the shielding wall first protrusion 12a and the shielding wall second protrusion 12c form arc surfaces relative to the axis center.

[0011] In addition, the fastening leg 14 is formed with a fastening leg rear slot 14b from the shielding wall so as to be elastically deformable to the left and right.

[0012] In addition, a wedge-shaped fastening leg fixing projection 14a is formed on the fastening leg.

[0013] In addition, an elastic bridge front protrusion 16a is formed on the lower part of the elastic bridge along the front direction, an elastic bridge hanging protrusion 16b is formed along the lower direction, and elastic bridge fixing protrusions 16c are formed on the elastic bridges 16 located on both sides in directions opposite to each other.

[0014] Another embodiment of the utility model is a quick connector fastened with a locking spring, which is formed with a handle mounting portion 10-1 for accommodating the handle 10 and a first shielding wall slot 12a-1, a second shielding wall slot 12c-1 and a shielding wall guide 12b-1 for guiding the elastic bridge 16, and the shielding wall guide 12b-1 is located between the first shielding wall slot 12a-1 and the second shielding wall slot 12c-1.

[0015] In addition, fastening leg confirmation windows 14a-1 are formed on the left and right of the quick connector, and the position of the fastening leg fixing protrusion 14a of the lock spring can be confirmed through the fastening leg confirmation windows 14a-1.

[0016] In addition, when the locking spring is temporarily fastened to the quick connector, the elastic bridge front protrusion 16a passes through the elastic bridge front protrusion first slot 16a-1 of the quick connector and is located in the elastic bridge front protrusion first slot 16a-1 of the quick connector.

[0017] In addition, when the end piece is fastened to the quick connector, the front protrusion 16a of the elastic bridge of the locking spring passes through the first slot 16a-1 of the front protrusion of the elastic bridge of the quick connector and is located between the first slot 16a-1 of the front protrusion of the elastic bridge of the quick connector and the elastic bridge hanging step 16b-1.

[0018] In addition, when the locking spring is temporarily fastened to the quick connector, the elastic bridge hanging protrusion 16b of the locking spring is located at the elastic bridge hanging step 16b-1 of the quick connector.

[0019] In addition, when the end piece is fastened to the quick connector, the elastic bridge fixing protrusion 16c of the locking spring is located at the elastic bridge fixing step 16c-1 of the quick connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is about the lock spring 100 and the quick connector 100 - 1 to which the lock spring 100 is fastened in the up-down direction.

[0021] Figure 2This is a front view of a locking spring disposed toward the outlet of the quick connector.

[0022] Figure 3 This is the other side, that is, the rear side, of the locking spring facing the inlet of the quick connector.

[0023] Figure 4 This is a side view of one of the two identical side faces of the lock spring.

[0024] Figure 5 Is inserted and installed with Figures 2 to 4 A three-dimensional view of the internal structure of a quick connector with a locking spring.

[0025] Description of symbols

[0026] 2: O-ring

[0027] 4: Gasket

[0028] 6: Retainer

[0029] 8: Annular protrusion

[0030] 10: Handle

[0031] 11: Hands under the face

[0032] 12: Shelter Wall

[0033] 12a: First protrusion of the shielding wall

[0034] 12b: Shelter wall slot

[0035] 12c: Second protrusion of the shielding wall

[0036] 14: Fasten the connecting legs

[0037] 14a: Tighten the connecting leg fixing protrusion

[0038] 14b: Fasten the slot behind the connecting leg

[0039] 14c: Fasten the side slots of the connecting legs

[0040] 16: Elastic Bridge

[0041] 16a: Elastic bridge with raised front

[0042] 16b: Elastic bridge hook protrusion

[0043] 16c: Elastic bridge fixing protrusion

[0044] 10-1: Handle installation

[0045] 11-1: Handle support

[0046] 12a-1: Shelter Wall First Slot

[0047] 12b-1: Shelter wall guide

[0048] 12c-1: Shelter wall second slot

[0049] 14a-1: Tightening connection leg confirmation window

[0050] 14b-1: Fasten the side guides of the connecting legs

[0051] 16-1: Elastic bridge confirmation window

[0052] 16a-1: The first slot on the front of the elastic bridge

[0053] 16a-2: The second slot on the front of the elastic bridge

[0054] 16b-1: Elastic bridge mounting sill

[0055] 16c-1: Elastic bridge fixed sill DETAILED DESCRIPTION

[0056] Figure 1 The figure is about a locking spring 100 and a quick connector 100-1 fastened and connected with the locking spring 100 in the up-down direction. O-rings 2a, 2b, gasket 4, and retainer 6 are inserted into the inlet of the quick connector and installed inside the quick connector. The O-rings are inner ring 2a and outer ring 2b, located in front and behind the gasket, and the position is fixed inside the quick connector by retainer 6. After that, before inserting the end piece into the inlet of the quick connector, the locking spring 100 is temporarily fastened and connected. The locking spring 100 is inserted downward from the top of the quick connector, thereby temporarily fastening and connecting to the cross section of the quick connector, and the end piece is introduced into the inlet of the quick connector. The annular protrusion 8 of the end piece temporarily elastically expands while passing through the locking spring, and the annular protrusion 8 elastically recovers after passing through the locking spring, thereby fixing and supporting the end piece. After passing through the locking spring 100, the annular protrusion 8 of the end piece is located between the retainer 6 and the locking spring 100 of the quick connector.

[0057] Figure 2 This is the front view of the locking spring facing the outlet of the quick connector. Figure 3 This is the other side of the locking spring facing the entrance of the quick connector, that is, the back side. Figure 4 is a side view of one of the two identical sides of the locking spring, Figure 5 Is inserted and installed with Figures 2 to 4 A three-dimensional view of the internal structure of a quick connector with a locking spring.

[0058] Overall, Figure 2 and Figure 3The locking spring of the quick connector is provided with a handle 10 at the top, an elastic bridge 16 is located on the left and right in the form of passing through the quick connector from top to bottom, a fastening connection leg 14 is located on the outside of the elastic bridge, and a shielding wall 12 is located between the handle 10 and the elastic bridge 16. The shielding wall 12 and the elastic bridge 16 form an arc shape along the inner side so as to completely surround the end piece introduced from the outside in the quick connector, and the arc is based on the virtual axis center of the end piece or the quick connector.

[0059] by Figure 1 As a reference, the locking spring is a structure that is fastened downward from the top of the quick connector. Therefore, the handle 10 for grasping the locking spring is located at the upper part of the locking spring. Figure 2 and Figure 3 In the embodiment, the handle has an arc shape in the form of a certain angle formed at the left and right sides relative to the axis center. In addition, the left and right sides of the handle also form a cone angle in the form of a certain angle formed at the axis center, and Figure 5 The handle mounting portion 10 - 1 of the quick connector is also formed with a taper angle to match it.

[0060] like Figure 4 As shown, the handle of the locking spring not only has a certain width along the front-to-back direction of the inlet and outlet of the quick connector, but also forms a tapered angle that becomes narrower toward the lower part of the handle 10, and in order to match it, Figure 5 The handle mounting portion 10 - 1 of the quick connector is also formed with a taper angle.

[0061] The upper part of the locking spring includes the handle 10 and forms an arc with the same curvature along the arc of the quick connector, and the elastic bridge 16 is respectively located on the left and right sides. The locking spring includes a shape for guiding the up and down movement in the quick connector so that the elastic bridge 16 is accurately installed on the quick connector.

[0062] exist Figure 2 and Figure 3 In the embodiment, the shielding wall 12 is located between the handle 10 of the locking spring and the elastic bridge 16. The shielding wall 12 is used to install the locking spring. When the end piece is fixed in the quick connector, the forward and backward movement of the locking spring is blocked, and the space between the handle 10 and the end piece is shielded except for the interval where the end piece passes through the locking spring.

[0063] like Figure 2 As shown, the shielding wall 12 is formed with a first shielding wall protrusion 12a, a shielding wall slot 12b and a second shielding wall protrusion 12c. The first shielding wall protrusion 12a is located at Figure 5 The shielding wall first slot 12a-1 inside the quick connector, and the shielding wall slot 12b and the shielding wall second protrusion 12c are respectively located Figure 5 The shielding wall guide 12b-1 inside the connector and the shielding wall second slot 12c-1.

[0064] A step difference is formed based on the entrance surface of the quick connector so that the first shielding wall slot 12a-1 is located below the second shielding wall slot 12c-1, and the shielding wall guide 12b-1 protrudes and is located between the first shielding wall slot 12a-1 and the second shielding wall slot 12c-1.

[0065] When the locking spring is inserted into the quick connector, the shielding wall slot 12b of the locking spring slides along the shielding wall guide 12b-1 of the quick connector, and the shielding wall first protrusion 12a of the locking spring slides along the shielding wall first slot 12a-1 of the quick connector, and the shielding wall second protrusion 12c of the locking spring slides along the shielding wall second slot 12c-1 of the quick connector. The shielding wall first slot 12a-1, the shielding wall second slot 12c-1 and the shielding wall guide 12b-1 are formed along the up and down direction of the locking spring.

[0066] Figure 2 The fastening leg 14 is a structure for detecting the process of installing the locking spring to the quick connector. Fastening leg fixing projections 14a are formed radially on the left and right fastening legs 14 of the locking spring, respectively. A fastening leg rear slot 14b and a fastening leg side slot 14c are formed so that the fastening leg fixing projection 14a is guided to the fastening leg confirmation window 14a-1. In particular, the fastening leg side slot 14c is guided along the fastening leg side guide 14b-1 of the quick connector.

[0067] The upper and lower positions of the locking spring can be known from the position of the fastening leg fixing protrusion 14a. If the fastening leg fixing protrusion 14a is located above the fastening leg confirmation window 14a-1, it is the position before the end piece is inserted and the elastic bridge has not yet expanded in the radial direction. If the end piece is inserted and the elastic bridge is expanded, then after the end piece is installed, the fastening leg fixing protrusion 14a is located below the fastening leg confirmation window 14a-1.

[0068] The fastening leg 14 is formed with a slot 14b at the rear of the fastening leg from the shielding wall so that it can be elastically deformed left and right, and the fastening leg fixing protrusion 14a is inclined at a certain angle so that it is easy to insert the fastening leg confirmation window 14a-1 in a wedge shape along the travel direction of installing the locking spring on the quick connector, and the end of the fastening leg confirmation window is used as a hanging step to make it difficult to reversely detach from the fastening leg confirmation window 14a-1.

[0069] The elastic bridge 16 located on the left and right of the locking spring is formed with an elastic bridge front protrusion 16a, an elastic bridge hanging protrusion 16b and an elastic bridge fixing protrusion 16c. First, during the fastening connection process of the locking spring, the elastic bridge front protrusion 16a moves downward along the elastic bridge front protrusion first slot 16a-1. Based on the inlet surface of the quick connector, the elastic bridge front protrusion second slot 16a-2 forms a slot deeper than the elastic bridge front protrusion first slot 16a-1 along the outlet direction of the quick connector. Therefore, when the elastic bridge front protrusion 16a passes through the elastic bridge front protrusion first slot 16a-1 at a certain depth, the elastic bridge 16 is inserted in an elastically bent form along the inlet surface direction of the quick connector, and the elastic bridge 16 inserted in an elastically bent form in the elastic bridge front protrusion second slot 16a-2 restores elasticity.

[0070] On the other hand, the elastic bridge hanging protrusion 16b and the elastic bridge fixing protrusion 16c are related to the position of the fastening leg fixing protrusion 14a of the fastening leg 14 in the fastening leg confirmation window 14a-1. In other words, if the fastening leg fixing protrusion 14a is located at the upper part of the fastening leg confirmation window 14a-1, the locking spring is in a temporary fastening connection state, which is a state in which the end piece has not yet reached the locking spring, and the elastic bridge hanging protrusion 16b is in a state of only contacting the elastic bridge fixing step 16c-1. If the end piece is inserted, after the elastic bridge expands, after the end piece is installed, the fastening leg fixing protrusion 14a is located at the lower part of the fastening leg confirmation window 14a-1, and the elastic bridge fixing protrusion 16c is elastically fastened to the outside of the elastic bridge fixing step 16c-1, and the elastic bridge hanging protrusion 16b remains in a state of contacting the end of the elastic bridge fixing step 16c-1. In other words, after the end piece is inserted and the elastic bridge is expanded, the elastic bridge fixing protrusion 16c is installed on the elastic bridge fixing step 16c-1.

Claims

1. A locking spring for fixing a quick connector, characterized in that: include: A handle (10) located above the locking spring; An elastic bridge (16) located on the left and right of the locking spring; A fastening connecting leg (14) located outside the elastic bridge (16); The elastic bridge (16) and the handle (10) are formed into one piece through the shielding wall (12). A shielding wall slot (12b) is formed on the shielding wall (12) so as to guide the locking spring in a direction of being fastened to the quick connector.

2. The locking spring for fixing the quick connector according to claim 1, characterized in that: The first shielding wall protrusion (12a) and the second shielding wall protrusion (12c) form a step difference with each other on the left and right sides of the shielding wall slot (12b).

3. The locking spring for fixing the quick connector according to claim 2, characterized in that: The lower surfaces of the shielding wall slot (12b), the shielding wall first protrusion (12a) and the shielding wall second protrusion (12c) form arc surfaces relative to the center of the axis.

4. The locking spring for fixing the quick connector according to claim 1, characterized in that: The fastening connection leg (14) is formed with a fastening connection leg rear slot (14b) from the shielding wall so as to be elastically deformable to the left and right.

5. The locking spring for fixing the quick connector according to claim 4, characterized in that: A wedge-shaped fastening leg fixing protrusion (14a) is formed on the fastening leg.

6. The locking spring for fixing a quick connector according to claim 1, characterized in that: An elastic bridge front protrusion (16a) is formed on the lower part of the elastic bridge along the front direction, an elastic bridge hanging protrusion (16b) is formed along the lower direction, and elastic bridge fixing protrusions (16c) are formed on the elastic bridges (16) on both sides in directions opposite to each other.

7. A quick connector, which is fastened with a locking spring for fixing the quick connector, comprising: A handle (10) located above a locking spring for fixing the quick connector; An elastic bridge (16) is located on the left and right of the locking spring; a fastening connection leg (14) is located outside the elastic bridge (16); the elastic bridge (16) and the handle (10) are formed as a whole through a shielding wall (12), and a shielding wall slot (12b) is formed in the shielding wall (12) so as to guide the locking spring in a direction of being fastened to the quick connector, characterized in that: A handle mounting portion (10-1) for accommodating the handle (10), a shielding wall first slot (12a-1) for guiding the elastic bridge (16), a shielding wall second slot (12c-1) and a shielding wall guide (12b-1) are formed. The shielding wall guide (12b-1) is located between the shielding wall first slot (12a-1) and the shielding wall second slot (12c-1).

8. The quick connector according to claim 7, characterized in that: A fastening leg confirmation window (14a-1) is formed on the left and right sides of the quick connector, and the position of the fastening leg fixing protrusion (14a) of the locking spring can be confirmed from the fastening leg confirmation window (14a-1).

9. The quick connector according to claim 7, characterized in that: When the locking spring is temporarily fastened to the quick connector, the elastic bridge front protrusion (16a) passes through the elastic bridge front protrusion first slot (16a-1) of the quick connector.

10. The quick connector according to claim 9, characterized in that: When the end piece is fastened to the quick connector, the elastic bridge front protrusion (16a) of the locking spring passes through the first slot (16a-1) of the elastic bridge front protrusion of the quick connector and is located between the first slot (16a-1) of the elastic bridge front protrusion of the quick connector and the elastic bridge hanging step (16b-1).

11. The quick connector according to claim 7, characterized in that: When the locking spring is temporarily fastened to the quick connector, the elastic bridge hanging protrusion (16b) of the locking spring is located on the elastic bridge hanging step (16b-1) of the quick connector.

12. The quick connector according to claim 11, characterized in that: When the end piece is fastened to the quick connector, the elastic bridge fixing protrusion (16c) of the locking spring is located at the elastic bridge fixing step (16c-1) of the quick connector.

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