KR20100053658A - Airbag connector - Google Patents

Abstract

An airbag electrical connector assembly comprising a socket connector and a plug connector having an actuator for breaking the shorting condition of the shorting element in the socket connector, and a CPA member for latching the plug connector in a pre-mounted position within the socket connector and for locking the plug connector when the connectors are fully mated. The CPA member includes a pair of locking legs and spring arms. The locking legs are shifted through interspaces between the latch arms and the plug projection into the locking position. The free end of each spring arm of CPA member is formed as a single lug having a supporting surface for being supported on stop wall means in the plug housing in the pre-mounted position of the connectors, and first and second slanting surfaces on the lug for cooperating with an inner insert wall of the socket connector for deflecting the spring arm to come free from the stop wall means, and for being latched behind the stop wall means.

Description

Airbag connector {AIRBAG CONNECTOR}

The present invention relates to electrical connectors and electrical connector assemblies for automotive airbag restraint systems.

The vehicle airbag system uses an electrical connection system comprising an outlet or socket connector on the airbag side and a plug connector on the control unit side. The connectors must be fastened while meeting the safety requirements relating to electrical safety (short circuit of the electrical terminals on the airbag side) and mechanical safety (solid connections between fastened connectors).

Electrical connectors for airbags are disclosed, for example, in European Patent No. 0 591 948 B1, which includes a socket connector with a short insert and a safety latch component for moving the short component to the non-short position when the connectors are fastened. It includes a plug connector having a. The safety latch component is also provided for operating the locking means which prevents the disconnection of the fastened electrical connector.

There is another development of electrical connection systems with safety interconnects. U.S. Patent No. 6,364,683 B1 is movably mounted to a dielectric housing to engage a dielectric housing having a rib with a tapered face, and a rib having a beam projecting in the downward direction and a rib holding the locking device in a temporary position. An electrical connector comprising a locking device mounted is disclosed. In other documents, the locking device is also referred to as "secondary locking device" or "CPA member" (Connector Position Assurance). The socket connector has a protrusion that cooperates with the tapered face of the beam of the plug connector to allow the beam to be separated from the stop face of the rib, thereby allowing the locking device to move to the fully locked position. The locking device has a latch arm fastened to the plug connector housing in a fully locked position and a locking arm bent to enter the latch groove of the socket connector housing by a boss of the housing. Thus, the locking arm is in a stressed state when the connector is engaged, which state is not allowed in certain applications.

Short-circuit electrical connector assemblies with a positive lock are disclosed in EP 1 160 934 B1, which includes a locking device for locking the connector in the fastened state, and a shorting of the socket connector when the connector is fully engaged. It shows a plug connector comprising an operating device separate and independent from the locking device to release the lock. The locking device includes a locking arm having a hook-shaped end positioned at the support surface of the latch arm of the plug connector, in a position before locking, when the connector is fully engaged, the locking arm is bent over the support surface and the socket connector Snap into recesses. The actuating device consists of a plate with long fingers and parallel and short latches, which are fixed to the plug connector housing and can be moved to a channel formed by the plug connector and the socket connector in the pre-locking position. However, the holding force is not large enough for certain applications, especially in applications where a holding force greater than 50N or even greater than 80N is required.

In another known electrical connector assembly (US Pat. No. 6,402,540 B1), the socket connector is an essentially cylindrical sleeve having a recess with one or more guide shoulders running parallel to the insertion direction of the plug connector and the contact pin of the socket connector. And a supporting coupling portion. The plug connector has an L-shaped arm that forms a T-shaped slot surrounding the arm with a guide shoulder. The two tongues extend in parallel with the projections of the plug connector and have a nose which is hung in the appropriate recess of the coupling. The secondary locking mechanism includes a pair of legs having end faces supported on the transverse braces in position prior to mounting of the connector assembly. During the fastening process, the transverse brace is pushed out of the path of the secondary locking device by the guide shoulder so that the transverse brace is pressed downward. The electrical connector assembly requires a special socket connector with a bevel face that pushes the transverse brace even at the beginning of the fastening process so that a stable locking of the secondary locking device in the pre-mounted state of the connector assembly is not possible.

Another plug connector with a secondary locking device is disclosed in US Pat. No. 6,530,799 B2. The plug connector has a plug protrusion with a locking arm that is secured to the end of the plug protrusion and extends up and forms a slot between the locking arm and the plug protrusion. The secondary locking device has several legs, including a locking leg, a shorting release leg and a spring arm with steps and protrusions. In the position prior to the mounting, the stepped portion of the spring arm is located on the wedge-shaped top that protrudes from the locking arm and the locking protrusion formed on the plug connector housing. While the plug connector is inserted into the socket, the spring arm is deflected by a locking projection acting against the staircase so that the spring arm is bent, thereby lifting the staircase from the locking projection. This allows the secondary locking device to be pressed further, so that the protrusion of the spring arm slides in the socket connector and the spring arm is bent to remain bent in the fully inserted position of the connectors. The bent state of such a safety member is undesirable in certain applications.

Another electrical connector assembly is disclosed in US Pat. No. 7,108,540 B2 and German Patent No. 10 2004 034321 B3. The plug connector includes a spring stop for the secondary locking device with a stop leg for this purpose so that the secondary locking device is fixed in the pre-assembly position. To engage the connectors, the secondary locking device is pressed down to rotate the spring stop device from the blocking position to the release position via the sliding guiding action of the wall area of the socket against the spring resistance of the spring stop device. The secondary locking device integrally has a guiding leg used to release a short circuit condition of the shorting component of the socket connector. It is not possible to move the secondary locking device independently from the actuator to release the short circuit condition.

It is an object of the present invention to design an electrical connector assembly for an automobile airbag restraint system that obviates the above disadvantages.

Another object of the present invention is that the fastened CPA member and the actuator can move independently from each other until the fastened socket connector and plug connector are in the fully locked position, and the CPA to release the shorted state of the socket connector It is to design an electrical plug connector with a member and an actuator.

Another object of the present invention is to provide a clamping force of at least 50N or even 80N, for example in the case of an electrical connector assembly for an automotive airbag restraint system, in which the CPA member and the actuator can be stably fixed in a position prior to mounting of the connector assembly. To design an electrical plug connector.

It is another object of the present invention to design an electrical plug connector in which either the latch or the locking member is essentially relaxed when the plug connector and the socket connector are fully engaged.

The invention is represented in claims 1 to 10.

The electrical connector assembly includes a socket connector of a predetermined configuration and a plug connector designed to achieve the above object. The socket connector includes a socket housing having an outlet hollow formed with a latch groove and an insert wall. The terminal means is received in the socket housing, some of which are short circuit components. The plug connector includes a body housing, a cylindrical plug protrusion, and a plug housing formed with a latch arm extending parallel to the plug protrusion from the body. The plug connector further includes an actuator for releasing a short circuit condition of the shorting component of the socket connector and a CPA member for locking the plug connector into the socket connector when fully engaged. The plug housing has an actuator and a CPA member as well as a passage and compartment partially provided with a guiding face for receiving the plug terminal. The plug housing and the CPA member are configured to secure the CPA member in a position prior to mounting with a predetermined latch force (greater than 50N or even 80N for the airbag system). The CPA member has a locking leg that fills the respective gap between the latch arm of the plug housing and the insert wall of the socket housing when the connectors are fully engaged, so that the latch arm engaged in the groove of the socket housing is locked. The CPA member also has a spring arm that starts from the pre-mounted position and opens to snap to the latch opening formed in the plug housing when the CPA member is fully inserted into the plug housing. In this state when fully inserted, the spring arm is essentially or substantially free of stress.

A special feature of the spring arms is the shape of the free ends formed by lugs. The lug has a flat, lowest surface (as viewed in the direction of the socket connector), a horizontal surface and two inclined or inclined surfaces angled with respect to each other. The lowest face of the lug hooked into the latch opening of the plug housing is located above the stop face formed in the plug housing at the position prior to mounting of the CPA member. While pressing the CPA member, the lower inclined surface of the lug engages the insert wall of the socket connector and exits the latch opening and snaps into the lower latch opening of the plug connector corresponding to the position where the connector is fully engaged. The lower latch opening is also formed with an inclined surface cooperating with an upper inclined surface of the lug of the spring arm. Thus, when pulling the CPA member, the lug of the spring arm allows the CPA member to move upward (away from the socket connector) to remove the locking leg of the CPA member from the gap between the latch arm of the plug housing and the insert wall of the socket connector. Comes out of the lower latch opening of the plug housing. This makes it possible to release the latched state of the latch arm of the plug connector from the groove of the socket connector and to remove the plug connector from the socket connector.

The plug housing and the CPA member are configured to secure the CPA member in a position prior to mounting with a predetermined latch force (greater than 50N or even 80N for the airbag system). The CPA member has a locking leg that fills the respective gap between the latch arm of the plug housing and the insert wall of the socket housing when the connectors are fully engaged, so that the latch arm engaged in the groove of the socket housing is locked. The CPA member also has a spring arm that starts from the pre-mounted position and opens to snap to the latch opening formed in the plug housing when the CPA member is fully inserted into the plug housing. In this state when fully inserted, the spring arm is essentially or substantially free of stress.

The design of the plug connector makes it possible to lock and unlock the CPA member and actuator more than once. Furthermore, by inserting the plug connector housing and pressing the CPA member while the actuator is held in the upper position, the connectors are fastened and locked together while the pins are still shorted (shown in FIG. 9B). The design of the plug connector thus makes it possible to interrupt the short circuit in the next step of mounting.

One embodiment of the present invention will be described by way of example with reference to the accompanying drawings.
1 is a perspective view of several components of a plug connector.
2 is a perspective view of the assembled plug connector.
3 is a perspective view of the actuator.
4 is a perspective view of the plug housing;
5 is a perspective view of the housing cover.
6 is a perspective view of a CPA member.
7A-7C are cross-sectional views of the plug connector and socket connector being fastened along the line VII-VII of FIG. 2.
8A-8E are similar cross-sectional views along the line VIII-VIII in FIG. 2.
9A to 9C are cross-sectional views taken along the line IX-IX of FIG. 2.

The connector assembly comprises a socket connector 1 and a plug connector 2. 1 shows the main components of the plug connector 2 of the present invention, namely the housing 3, the cover 4, the terminal assembly 5, the actuator 6 and the connector positioning component or the CPA member 7. do. The component is small, ie the length of the housing 3 is about 20 mm and the latch shape is about 1 mm.

The plug connector housing 3 has a latch arm 22 having a body portion 20, a cylindrical plug projection 21 and a lug 29 formed on a latch arm 22. The plug projection 21 includes a recess 23 that forms an interspace adjacent the hollow 23 and each latch arm 22. Within the hollow 23, a wall arrangement 25 (see FIG. 2) is also provided for fixing the terminal contacts 51, 52. The wall arrangement 25 has a horizontal rib 26 for forming the upper latch opening 27 together with the body portion 20 and the lower latch opening 28 together with the wall of the plug projection 21 (FIGS. 8A and 8A). 9A) (the terms "top" and "bottom" relate to the normal position of the outlet or socket connector 1 and are by no means limiting). Moreover, each of the transverse ribs 26 divides the space adjacent the transverse ribs by the outer axis 23a and the inner axis 23b (see FIG. 8D).

4 shows the upper side of the plug housing 3 and shows the left chamber 30a and the right chamber 30b. The terminal assembly 5 comprises respective conductors 50 surrounded by the terminals 51 and 52 and respective ferrite elements 53 and are mounted in compartments 30a and 30b. The terminals 51 and 52 extend through the opening 31 of the housing wall 25. Conductor 50 extends through strain relief recess 33. Stitching openings 34 are provided to receive the fixed ends 54 of the terminals 52. The lid 4 secures the conductor 50 and the nose 32 of the housing 3 to secure the ferrite 53 from above by a leaf spring 41 fixed to the upper surface 40 of the lid 4. ) Is fastened to.

The lower chamber 30b is configured to receive the upper part of the actuator 6 and the CPA member 7. For the lower end of the actuator 6 and the CPA member 7, several passages, that is, slotted passages 36, a pair of arched passages 37, a pair of narrow passages 38, and a right chamber ( 30b) as well as a pair of noses 39a at the upper end and a slotted passage 39 narrowed by a nose (not shown) near the lower end of the passage 39. Each passage 37 leads to each recess 24 (see FIG. 7B) to form a straight guiding channel for each locking leg 70 of the CPA member 7.

The actuator 6 (see FIG. 3) has an opening 61 and an upper base plate 60 for accessing the CPA member 7. A guiding wall 62, a pair of latch arms 64 and a guiding leg 65 are suspended from the base plate 60. The guiding wall 62 has a recess for forming an inclined shoulder 62a (see FIG. 1) for latch engagement with a nose (not shown) extending from the passage 39 of the plug housing. Alternatively or additionally, a latch 62b (see FIG. 3) is provided to releasably secure the guiding wall 62 in the passage 39. The latch arm 64 has a hook at its end. The guiding leg 65 has a latch nose 65a. The actuator 6 is mounted to the plug housing 3 to cover the right chamber 30b and the passage 39. In the process, the wall 62 is guided in the passage 39 and the guiding leg 65 passes through the passage 36.

The CPA member 7 (see FIG. 6) has a pair of locking legs 70 connected by a plate 71 having an opening 72 for receiving the latch arm 64 of the actuator 6. The hook of the latch arm 64 supports the plate 71 and thus fastens the CPA member 7 which lies transversely to the opening 61 of the actuator 6. Moreover, the CPA member 7 has one or more spring arms 73 and preferably a pair of spring arms 73 fixed to the plate 71 and integrally formed with the plate 71. Each spring arm 73 has a lower end with a lug 74 formed at the lower end. Each lug 74 has a bottom slope 74a as well as an upper slope 74b and a bottom slope 74c. The inclined surfaces 74b and 74c are inclined with respect to the horizontal plane and take an acute angle in a range between 60 ° and 90 ° with respect to each other. The transverse ribs 26 (see FIG. 8A) of the hollow 23 of the plug protrusion 21 are essentially in the horizontal plane of the upper surface 26a (see FIG. 8E) and the inclined surface 74b of the spring arm 73. It has a rectangular outline with a lower inclined surface 26b (see FIG. 8B) extending in parallel. The transverse ribs 26 form a stop wall, ie the upper surface 26a of the transverse ribs 26 is arranged to support the lowest surface 74a of the spring arm 73.

The outlet connector 1 represented in the radial direction in FIGS. 7, 8 and 9 has an inner insert 11 with a pin terminal 12 arranged in the outer housing 10 and the inner insert. The shorting clip 13 can be lifted to connect the pins 12 (see FIG. 9A), usually to short between the pins, and to release the shorts by actuating the legs 65 of the actuator 6 (FIG. 9C). Reference). The housing 10 forms a circular cavity 14 with an inlet 14a for a plug connector, in particular for a latch arm lug 29 of the plug connector. The cavity 14 also has a radial groove 15 which receives the lug 29 of the latch arm 22 in the form of a latch. The insert 11 has an outer wall 16, the outer side of which forms a guiding surface for the inner side of the outer wall of the plug projection 21 (see FIG. 7B). The insert 11 also has an inner wall 17 with a slot 14b for guiding the web 25a of the plug connector housing 3 and cooperating with the lug 74 of the CPA member 7. (See FIGS. 8A-8E).

The plug connector 2 is fastened to the socket connector 1 as follows.

The plug connector 2 has an actuator 6 and a CPA inserted into the appropriate passages 36 and 39 and the passages 37 and 38 of the plug connector housing 3, respectively, as shown in FIGS. 7A, 8A and 9A. It is assembled with the member 7. The lower rim of the plug protrusion 21 allows the lug 29 of the latch arm 22 to reach the inlet 14a of the socket connector 1 and the terminals 51 and 52 to reach the pin terminal 12. It is inserted into the circular cavity 14 of the connector 1 (see FIGS. 7B and 8A). Furthermore, pressing the plug connector causes the latch arm 22 to bend so that the lug 29 is fixed between the wall 16 of the socket connector housing and the inlet portion 14a (see FIGS. 7C and 8B). In this state, the locking leg 70 of the CPA member 7 is blocked from entering further into the plug connector 2 and the lug 74 of the CPA member 7 has a bottom rib 74a with a horizontal rib 26. It extends up to the horizontal ribs 26 so as to lie on the top face 26a of the bottom face, and the bottom inclined face 74c contacts the wall 17 of the socket connector 1 (see FIG. 8B). Moreover, the lugs 74 of the CPA member 7 are fastened to each opening 27. This is the position before the plug connector 2 is mounted into the socket connector 1 (see FIGS. 7C, 8B and 9A). In the position before the mounting there is a CPA member 7 and an actuator 6 which are stably fixed.

To fully engage the connector, the plug connector 2 is further depressed as shown in FIG. 7D, and the lug 29 of the latch arm 22 snaps into the groove 15 of the socket connector housing 10. . In this process, the guiding channel for the locking leg 70 between the passage 37 and the recess 24 is not disturbed. At the same time, the spring arm 73 of the CPA member 7 is opened by the cam phenomenon of the wall 17 of the socket connector housing 10 to the inclined surface 74c, which is compared with reference to FIGS. 8B and 8C. . Lug 74 is out of its upper stable position of opening 27, as shown in FIG. 9B. Further pressing of the plug connector 2 also leads to relative movement between the actuator 6 / CPA member 7 and the plug connector housing 3, as shown in FIG. 8D. The spreading of the spring arm 73 is continued by the cam phenomenon of the transverse rib 26 made of the inclined surface 74c of the spring arm 73, as seen in comparison with FIGS. 8C and 8D. The lug 74 eventually reaches the lower stable position 28, as shown in FIGS. 8E and 9C. In this position, the lug 65a of the actuator 6 is fastened behind the appropriate recess (not shown) of the plug housing 3, and the actuator leg 65 is in contact with the terminal pin 12 of the socket connector. The shorting clip 13 is moved so that it will not be. At the same time, each leg 70 of the CPA member 7 slides along a recess 24 forming an interspace in the socket housing 10 and the outer face of the wall 16 of the passage 37, and FIG. As shown in FIGS. 7D and 7E, each latch arm 22 enters at an interval behind each lug 29 to lock to a locked position. In this state, the plug connector cannot be removed without lifting the CPA member.

Detaching the plug connector 2 from the socket connector 1 occurs by pulling the actuator 6 and the CPA member 7 to the position shown in FIG. 7D to unlock the latch arm 22 of the plug connector housing. do. This makes it possible to remove the plug connector from the socket connector housing as shown in FIGS. 7C, 7B and 7A.

The design of the plug connector 2 makes it possible to lock and unlock the CPA member 7 and the actuator 6 more than once. Furthermore, by inserting the plug connector housing 3 and pressing the CPA member 7 while keeping the actuator 6 in the upper position, the connectors 1, 2 are fastened and locked with each other, while the pin 12 is still Shorted (shown in FIG. 9B). The design of the plug connector 2 thus makes it possible to interrupt the short circuit in the next step of mounting.

Claims (10)

An electrical connector assembly comprising a socket connector (1) and a plug connector (2),
The socket connector 1 comprises a socket comprising a terminal 12 connected to a shorting component 13 and an outlet cavity 14 having an outer insert wall 16, an inner insert wall 17 and a latch groove 15. Has a housing (10),
The plug connector 2 has a main body portion 20 forming compartments 30a, 30b and passages 36, 37, 38, 39, a cylindrical plug protrusion having a stop wall means and a hollow 23 therein ( A plug housing 3 comprising a latch arm 22 having a lug 29 cooperating with a latch groove 15 of a socket connector 1, a shorting element 13 of the socket connector 13; Has an actuator 6 for releasing the state and a CPA member 7 for engaging and fastening the plug connector at a position before mounting in the socket connector and locking the plug connector when the connectors 1, 2 are fully engaged;
The CPA member 7 comprises a pair of locking legs 70 and one or more spring arms 73 at their ends to engage and engage the plug connector in the pre-mounted position,
The latch arm 22 of the plug connector 2 separated from the socket connector 1 is open to the socket connector 1 side between the latch arm 22 and the plug protrusion 21 and further includes a main body passage. Extending parallel to the plug projection 21 from the body portion 20 to form respective interspaces 24 opened by compartment 37 to the compartment 30b side of the plug housing,
The interspace 24 is provided to receive the outer insert wall 16 of the socket connector 1, which causes the latch arm 22 to bend when the connectors 1 and 2 are fastened, and after fastening Together with the body passage 37 provides a straight channel for inserting the locking leg 70 of the CPA member 7, the locking leg 70 being inserted into the latch arm of the plug housing 3. 22 is supported on the outer insert wall 16 and the latch arm 22 of the socket housing 10 so as to lock the socket housing 10.
The free end of the spring arm 73 of the CPA member 7 is a single lug with a support surface 74a which is supported by the stop wall means of the plug housing 3 in a position prior to the mounting of the connectors 1, 2. 74, the first inclined surface 74c and the second inclined surface 74b of the lug 74 are arranged at an angle with respect to each other, and the first inclined surface 74c is the spring arm 73. An electrical connector which is present to be hooked behind the stop wall means and to cooperate with the inner insert wall 17 of the socket connector 1 to deflect from the stop wall means. Assembly. 2. The stop wall means according to claim 1, wherein the stop wall means forms a first latch opening 27 proximate to the housing body portion 20 and a second latch opening 28 away from the housing body portion 20. An electrical connector comprising transverse ribs (26) arranged in the hollow (23) of the cylindrical plug protrusion (21). 3. The transverse rib (26) according to claim 2, wherein the horizontal rib (26) has an upper surface (26a) cooperating with the support surface (74a) of the spring arm (73) and a second inclined surface (74b) of the spring arm lug (74). An electrical connector having a rectangular cross section formed by cooperating inclined surfaces 26b. 4. The lateral ribs 26 of the stop wall means according to claim 2 or 3, when the connectors (1,2) are fastened, each of the springs (23) of the cylindrical plug projection (21). An electrical connector for separating the first shaft (23a) for guiding the arm (73) and the second shaft (23b) for guiding and receiving the inner insert wall (17) of the socket connector (1). 5. The CPA member 7 according to claim 2, wherein the CPA member 7 has a pair of spring arms 73, each spring arm 73 having a single lug facing each other at its lower end. 74, wherein the plug connector 2 comprises the pair of transverse ribs 26, each lug 74 cooperates with one of the transverse ribs 26, respectively.
A pair of inner insert walls (17) of the socket connector (1) are provided for cooperating with one of the spring arms (73) respectively when the connectors (1,2) are fastened. The socket housing (10) according to any one of the preceding claims, wherein the socket housing (10) has a guiding slot (14b), the plug housing (3) has a guiding rib (25a), and the slot (14b). ) And the rib (25a) cooperate with each other when the connectors (1,2) are fastened. The CPA member (7) according to any one of the preceding claims, wherein the CPA member (7) has a horizontal plate (71) with one or more openings (72) therein,
The actuator (6) having latch arm means (64) for cooperating with the CPA member opening (72) to secure the CPA member (7) to the actuator. 8. An electrical connector as claimed in claim 7, wherein the actuator (6) has a horizontal plate (60) having an opening (61) therein for access to the CPA member (7) fixed below the horizontal plate (60). . The electrical connector according to any one of the preceding claims, wherein the actuator (6) and the CPA member (7) are integrally formed as one part. A plug housing 3 comprising compartments 30a and 30b for accommodating the terminal means 5,
A cover 4 for sealing the compartment,
An actuator 6 for cooperating with the shorting element 13 of the socket connector 1 and
CPA member for hanging and fastening the plug connector 2 in a position before mounting relative to the socket connector 1 and for locking the connectors 1 and 2 together when the connectors 1 and 2 are fastened. A plug connector comprising a (7),
The plug housing 3 has a body portion 20, a hollow 23 for receiving a portion of the actuator 6 and the CPA member 7 and at least one transverse rib 26 to form a stop wall means. Is formed of a cylindrical plug protrusion 21 and a latch arm 22,
Each of the latch arms 22 has lugs 29 at its ends for cooperating with the socket connector 1, the latch arms 22 having recesses 24 of the plug projection 21. Extending from the body portion 20 essentially parallel to the plug protrusion 21 in the face of which the passage 37 is between each latch arm 22 and the body portion 20,
The CPA member 7 comprises a pair of locking legs 70 and one or more spring arms 73,
The locking legs 70 each latch arm 22 to support and lock each lug 29 of the latch arm 22 when the latch arm 22 is secured to the socket connector 1. 22 through the respective passages 37 between the body portion 20 and
The spring arm 73 has a free end formed of a single lug 74 having an end face 74a, a first inclined surface 74c and a second inclined surface 74b arranged at an angle to each other and in a fastening direction. The end face 74a of the lug 74 is positioned above the transverse rib 26 at a position prior to the mounting of the CPA member 7, and the first inclined surface 74c of the socket connector 1 during engagement. A plug connector arranged to cooperate with a wall surface (17), the second inclined surface (74b) being positioned behind the transverse rib (26) with the spring arm (73) relaxed.

Images