WO2013139297A1

WO2013139297A1 - Shock-proof mechanical magnetic lock

Info

Publication number: WO2013139297A1
Application number: PCT/CN2013/073043
Authority: WO
Inventors: 张宗志
Original assignee: 上海欧一安保器材有限公司
Priority date: 2012-03-22
Filing date: 2013-03-22
Publication date: 2013-09-26
Also published as: BR112014023326B1; PL2829671T3; CN102619404A; CN102619404B; EP2829671A4; EP2829671B1; EP2829671A1; PT2829671T; ES2822602T3; RU2014136548A; DK2829671T3

Abstract

A shock-proof mechanical magnetic lock, comprising an iron plate (211) located on one side, a pull plug (212) vertically protruding on the iron plate (211), a magnet (221) located on the other side, a sleeve (222) located in the magnet (221) and having a top opening for inserting the pull plug (212), and a stop ring (223) sleeved outside the sleeve (222); the stop ring (223) is fixed on the magnet (221); the bottom of the sleeve (222) is installed on a substrate (226) below the magnet (221) via a bottom connecting piece (227); the magnet (221) and the stop ring (223) can axially move relative to the sleeve (222); and the sleeve (222) and the stop ring (223) are provided with a spring (229) therebetween.

Description

一种避震机磁力锁 Shock absorber magnetic lock

技术领域 Technical field

本发明涉及一种锁具，尤其涉及一种避震机械磁力锁。背景技术 The invention relates to a lock, in particular to a shock absorber mechanical magnetic lock. Background technique

一种现有的避震机械磁力锁如图 1和图 2所示，锁体一侧的铁板 111上设有垂直凸起的拉栓 112, 另一侧的磁铁 121 内包括顶部开口能够***拉栓 112的套筒 122和套置在套筒 122***的止动环 123。其中，拉栓 112端头形成凸缘。套筒 122的侧壁开有多个圓孔，各个圓孔中放置滚珠 124。止动环 123的中心孔的上部分孔径大于下部分孔径。套筒 122底部通过底部连接件 127固定在磁铁 121下方的基板 126上，止动环 123固定在磁铁 121上，磁铁 121和止动环 123能够相对于套筒 122竖直移动。 An existing shock absorber mechanical magnetic lock is shown in FIG. 1 and FIG. 2, the iron plate 111 on one side of the lock body is provided with a vertically protruding pull bolt 112, and the magnet 121 on the other side includes a top opening for insertion. The sleeve 122 of the pull pin 112 and the stop ring 123 sleeved around the sleeve 122. Wherein, the end of the pull pin 112 forms a flange. The side wall of the sleeve 122 is provided with a plurality of circular holes, and balls 124 are placed in the respective circular holes. The upper portion of the center hole of the stop ring 123 has a larger aperture than the lower portion. The bottom of the sleeve 122 is fixed to the base plate 126 below the magnet 121 by a bottom joint member 127, and the stopper ring 123 is fixed to the magnet 121, and the magnet 121 and the stopper ring 123 are vertically movable with respect to the sleeve 122.

底部连接件 127—端固定在基板 126上面的套筒 122底部，另一端固定在基板 126下面的垫块 125上。垫块 125上下表面为平面，大体为矩形。 The bottom connector 127 is fixed to the bottom of the sleeve 122 above the substrate 126, and the other end is fixed to the spacer 125 below the substrate 126. The upper and lower surfaces of the spacer 125 are flat and generally rectangular.

一端固定在磁铁 121上的限位螺釘 128, 螺杆延伸穿过基板 126上对应的孔并在末端形成螺帽，基板 126上对应孔的直径大于限位螺釘 128的螺杆直径并且小于其螺帽直径，套置在限位螺釘 128上的弹簧 129卡在限位螺釘 128的螺帽和基板 126之间。在现有的锁体结构中采用位于套筒 122两侧的两个限位螺釘 128并且每个限位螺釘 128上各套置一个弹簧 129。 A limiting screw 128 is fixed on the magnet 121 at one end. The screw extends through a corresponding hole in the substrate 126 and forms a nut at the end. The diameter of the corresponding hole on the substrate 126 is larger than the diameter of the screw of the limiting screw 128 and smaller than the diameter of the nut. The spring 129 seated on the set screw 128 is caught between the nut of the set screw 128 and the base plate 126. In the existing lock body structure, two limit screws 128 on both sides of the sleeve 122 are used and a spring 129 is placed on each of the limit screws 128.

锁体通电后，关门时磁铁 121产生的磁场吸合铁板 111 , 拉栓 112从磁铁 121中套筒 122的顶部开口***，如图 1所示，这时止动环 123孔径大的部分包围滚珠 124, 因此拉栓 112的端头凸缘能够进入套筒 122, 这时锁合力只是磁铁 121的吸合力。如果铁板 111上受到外力作用，则由于吸合力作用，铁板 111将拉动磁铁 121克服弹簧 129的弹力而与基板 126分离，如图 2所示，从而止动环 123相对于套筒 122向上移动，止动环 123孔径小的部分包围滚珠 124, 压迫滚珠 124向轴心靠紧抱住拉栓 112的端头凸缘无法打开。这种现有的磁力锁使用寿命较低，只有 8-12万次使用寿命。耐沖击力较差，不能满足客户的要求。经常性卡死，即滚珠与拉栓之间容易抱死。两颗复位弹簧容易断裂。底部连接件上的垫块结构设计存在缺陷，当门发生转动时锁体随铁板多方向的转动不足，锁体受力不均匀而产生杠杆作用，容易被打开、安全性较低。 After the lock body is energized, the magnetic field generated by the magnet 121 closes the iron plate 111 when the door is closed, and the pull pin 112 is inserted from the top opening of the sleeve 122 of the magnet 121, as shown in Fig. 1, when the stop ring 123 is surrounded by a large aperture. The ball 124, so that the end flange of the pull pin 112 can enter the sleeve 122, in which case the locking force is only the suction force of the magnet 121. If the iron plate 111 is subjected to an external force, the iron plate 111 will pull the magnet 121 away from the substrate 126 against the elastic force of the spring 129 due to the suction force, as shown in FIG. 2, so that the stop ring 123 is upward with respect to the sleeve 122. Moving, the portion of the stop ring 123 having a small aperture surrounds the ball 124, and the end flange of the pressing ball 124 that abuts against the shaft 112 against the shaft cannot be opened. This existing magnetic lock has a low service life and has a service life of only 80,000 to 120,000 cycles. The impact resistance is poor and cannot meet the requirements of customers. Frequently stuck, that is, it is easy to lock between the ball and the pull bolt. The two return springs are easily broken. There is a defect in the design of the spacer structure on the bottom connector. When the door rotates, the rotation of the lock body with the multi-directional direction of the iron plate is insufficient, and the lock body is unevenly loaded to generate a lever, which is easy to be opened and has low safety.

发明内容 Summary of the invention

本发明要解决的技术问题是提供一种锁体结构更加筒单耐用而且更加安全的避震机械磁力锁。 The technical problem to be solved by the present invention is to provide a shock-absorbing mechanical magnetic lock with a lock body structure that is more durable and more secure.

为解决上述技术问题，本发明采用如下技术方案： In order to solve the above technical problem, the present invention adopts the following technical solutions:

一种避震机械磁力锁，包括：位于一侧的铁板和从铁板上垂直凸起的拉栓、以及位于另一侧的磁铁、位于磁铁内并且顶部开口能够***拉栓的套筒和套置在该套筒***的止动环。拉栓的端头形成凸缘，套筒和止动环上具有互相配合调节该套筒内部空腔的孔径的机构。止动环固定在磁铁上，套筒底部通过底部连接件安装到磁铁下方的基板上，磁铁和止动环能够相对于套筒轴向移动，套筒和止动环之间设有弹簧。 A suspension mechanical magnetic lock includes: an iron plate on one side and a pull bolt vertically protruding from the iron plate; and a magnet on the other side, a sleeve in the magnet and a top opening capable of inserting the pull bolt, and A snap ring that is placed around the periphery of the sleeve. The ends of the pull bolts form a flange, and the sleeve and the snap ring have mechanisms for cooperating with the apertures that adjust the internal cavity of the sleeve. The retaining ring is fixed to the magnet, and the bottom of the sleeve is mounted to the base plate under the magnet through the bottom connecting member. The magnet and the retaining ring are axially movable relative to the sleeve, and a spring is disposed between the sleeve and the retaining ring.

对于上述避震机械磁力锁，底部连接件一端固定在套筒底部，另一端固定在基板下面的垫块上，套筒底部穿过基板上的对应开口抵靠在垫块上。 For the above-mentioned suspension mechanical magnetic lock, one end of the bottom connecting member is fixed to the bottom of the sleeve, and the other end is fixed on the spacer under the substrate, and the bottom of the sleeve abuts against the corresponding block through the corresponding opening on the substrate.

对于上述避震机械磁力锁，基板上对应开口的直径大于套筒底部直径并且小于垫块水平截面的最大直径。 For the above-mentioned suspension mechanical magnetic lock, the diameter of the corresponding opening on the substrate is larger than the diameter of the bottom of the sleeve and smaller than the maximum diameter of the horizontal section of the spacer.

对于上述避震机械磁力锁，底部连接件为螺釘。 For the above-mentioned suspension mechanical magnetic lock, the bottom connecting piece is a screw.

对于上述避震机械磁力锁，垫块的上下表面为弧形。 For the above-mentioned suspension mechanical magnetic lock, the upper and lower surfaces of the spacer are curved.

对于上述避震机械磁力锁，套筒上部开口边沿径向向外延伸形成凸缘。对于上述避震机械磁力锁，套筒开口处的凸缘的直径大于止动环的外壁直径。 For the above-mentioned suspension mechanical magnetic lock, the upper opening edge of the sleeve extends radially outward to form a flange. For the above-mentioned suspension mechanical magnetic lock, the diameter of the flange at the opening of the sleeve is larger than the diameter of the outer wall of the retaining ring.

对于上述避震机械磁力锁，基板由铝槽构成。 For the above-mentioned suspension mechanical magnetic lock, the substrate is composed of an aluminum groove.

与现有技术相比，本发明技术方案主要的优点如下： 1. 将现有锁体结构中两个弹簧和两个限位螺丝去除，将弹簧设在套筒和止动环之间，因此提高了锁体的寿命，由原来的 8-12万次使用寿命提高到现在的 50万次使用寿命。 Compared with the prior art, the main advantages of the technical solution of the present invention are as follows: 1. Remove the two springs and the two limit screws in the existing lock body structure, and set the spring between the sleeve and the stop ring, thus improving the life of the lock body, from the original 80,000 to 120,000 times. Life expectancy has increased to 500,000 lifespans today.

2. 改进了底部连接件上套置的垫块，使原来的矩形垫块变为现在的带球面垫块，目的是当门转动时磁铁能够随铁板向多方位转动，避免原来的呆板状态，因此提高了锁体抗沖击能力，沖击测试由原来的 120J增加到现在的 160J。 2. The spacers on the bottom connector are improved, and the original rectangular block is changed to the current spherical pad. The purpose is to rotate the magnet with the iron plate in multiple directions when the door rotates, avoiding the original rigid state. Therefore, the impact resistance of the lock body is improved, and the impact test is increased from the original 120J to the current 160J.

3. 套筒顶部开口结构筒单，可有效的防止灰尘进入锁体内部，降低内部滚珠卡死的概率。 3. The top of the sleeve has a single structure, which can effectively prevent dust from entering the inside of the lock body and reduce the probability of the inner ball being stuck.

4. 减少了组装的零件，在加工组装方面的成本有所降低。 4. Reduced assembly parts and reduced cost in processing and assembly.

5. 套筒的固定机构以球面的方式和基板配合，带球面的垫块的随机转向，最大可能配合门的转动，当门转动时吸合的铁板和磁铁可以随之发生多方向转动，这样最大限度地克服因门转动造成的缺陷，门不易被打开提高安全性。 5. The fixing mechanism of the sleeve is matched with the substrate in a spherical manner. The random steering of the spherical block can maximize the rotation of the door. When the door rotates, the iron plate and the magnet that are attracted can rotate in multiple directions. This minimizes the defects caused by the rotation of the door, and the door is not easily opened to improve safety.

附图说明 DRAWINGS

图 1示出一种现有的磁力锁未受外力时的上锁状态； Figure 1 shows a locked state of a conventional magnetic lock when it is not subjected to an external force;

图 2示出图 1中的磁力锁受到外力时的上锁状态； Figure 2 shows the locked state of the magnetic lock of Figure 1 when subjected to an external force;

图 3示出本发明的磁力锁未受外力时的上锁状态； Figure 3 is a view showing the locked state of the magnetic lock of the present invention when it is not subjected to an external force;

图 4示出图 3中的磁力锁受到外力时的上锁状态。具体实施方式如图 3和图 4所示，本发明的避震机械磁力锁包括位于一侧的铁板 211 和从铁板 211上垂直凸起的拉栓 212、以及位于另一侧的磁铁 221、位于磁铁 221内并且顶部开口能够***拉栓 212的套筒 222和套置在该套筒 222外围的止动环 223。其中，拉栓 212的端头形成凸缘。套筒 222和止动环 223 上具有互相配合调节该套筒 222内部空腔的孔径的机构，该机构一方面包括套筒 222侧壁上开有的多个圓孔，在各个圓孔中放置的滚珠 224, 另一方面在止动环 223的侧壁内表面形成台阶，而且止动环 223的内部空腔的上部分孔径比下部分孔径大。止动环 223固定在磁铁 221上，套筒 222底部通过底部连接件 227能相对基板 226转动地安装到磁铁 221下方的基板 226上，磁铁 221和止动环 223能够相对于套筒 222轴向移动。套筒 222和止动环 223 之间设有弹簧 229。 Fig. 4 shows the locked state of the magnetic lock of Fig. 3 when an external force is applied. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS As shown in FIGS. 3 and 4, the suspension mechanical magnetic lock of the present invention includes an iron plate 211 on one side and a pull bolt 212 vertically protruding from the iron plate 211, and a magnet 221 on the other side. a sleeve 222 located in the magnet 221 and having a top opening for inserting the pull bolt 212 and a stop ring 223 sleeved around the sleeve 222. Wherein, the end of the pull pin 212 forms a flange. The sleeve 222 and the retaining ring 223 have a mechanism for cooperating with an aperture for adjusting the inner cavity of the sleeve 222. The mechanism includes a plurality of circular holes formed in the side wall of the sleeve 222 on one hand, and is placed in each circular hole. Ball 224, on the other hand A step is formed on the inner surface of the side wall of the stopper ring 223, and the upper portion of the inner cavity of the stopper ring 223 has a larger aperture than the lower portion. The stop ring 223 is fixed on the magnet 221, and the bottom of the sleeve 222 is rotatably mounted to the substrate 226 below the magnet 221 via the bottom connecting member 227, and the magnet 221 and the stop ring 223 are axially movable with respect to the sleeve 222. mobile. A spring 229 is disposed between the sleeve 222 and the stop ring 223.

底部连接件 227—端固定在套筒 222底部，另一端固定在基板 226下面的垫块 225上，套筒 222底部穿过基板 226上的对应开口抵靠在垫块 125上，而且基板 226上对应开口的直径大于套筒 222底部直径并且小于垫块 125水平截面的最大直径。其中，底部连接件 227优选为螺釘，在套筒 222底部和螺釘的螺帽之间的螺杆上所套置的垫块 225优选为上下表面为弧形的铁块。 The bottom connector 227 is fixed at the bottom of the sleeve 222, and the other end is fixed to the spacer 225 under the substrate 226. The bottom of the sleeve 222 passes through the corresponding opening on the substrate 226 against the spacer 125, and the substrate 226 is The diameter of the corresponding opening is larger than the diameter of the bottom of the sleeve 222 and smaller than the maximum diameter of the horizontal section of the spacer 125. The bottom connector 227 is preferably a screw, and the spacer 225 that is placed on the screw between the bottom of the sleeve 222 and the nut of the screw is preferably an iron block having an arcuate upper and lower surfaces.

优选的是，套筒 222上部开口边沿径向向外延伸形成凸缘，更优选的是套筒 222开口处的凸缘的直径大于止动环 223的外壁直径。 Preferably, the upper opening edge of the sleeve 222 extends radially outwardly to form a flange, and more preferably the diameter of the flange at the opening of the sleeve 222 is greater than the diameter of the outer wall of the stop ring 223.

作为一个例子，基板 226可以由铝槽构成。套筒 222侧壁上的多个圓孔可以为六个，滚珠 224可以为六颗钢珠。 As an example, the substrate 226 may be constructed of an aluminum bath. The plurality of circular holes in the side wall of the sleeve 222 may be six, and the balls 224 may be six steel balls.

本发明的避震机械磁力锁是采用电磁的吸合与释放的方式实现开锁上锁的过程，电磁力与机械力的转换是通过电磁吸合拉动锁体内部件位移而实现相互转换。 The magnetic lock of the suspension mechanical machine of the invention realizes the process of unlocking and unlocking by means of electromagnetic suction and release, and the conversion of electromagnetic force and mechanical force is realized by electromagnetic attraction to pull the displacement of the components in the lock body to realize mutual conversion.

锁体通电后，关门时磁铁 221产生的磁场吸合另一侧的铁板 211 , 同时拉栓 212从磁铁 221中套筒 222的顶部开口***，如图 3所示，这时止动环 223的大孔径部分包围套筒 222上的滚珠 224, 拉栓 212的端头凸缘滑过滚珠 224进入套筒 222内腔。这时是靠磁铁 221和铁板 211的磁吸合力维持上锁，没有机械力，此时的锁紧力较小。 After the lock body is energized, the magnetic field generated by the magnet 221 when closing the door attracts the iron plate 211 on the other side, and the pull pin 212 is inserted from the top opening of the sleeve 222 of the magnet 221, as shown in FIG. 3, at this time, the stop ring 223 The large aperture portion encloses the ball 224 on the sleeve 222, and the end flange of the pull pin 212 slides over the ball 224 into the lumen of the sleeve 222. At this time, the magnetic attraction force of the magnet 221 and the iron plate 211 is maintained to be locked, and there is no mechanical force, and the locking force at this time is small.

当铁板 211受到外力时，由于铁板 211和磁铁 221之间的吸合力作用，铁板 211带动磁铁 221离开基板 226, 如图 4所示，从而使止动环 223克服弹簧 229的弹力相对于套筒 222向上移动，直到止动环 223的小孔径部分包围套筒 222上的滚珠，套筒 222上的多个滚珠在止动环 223的作用下沿着径向向中心挤压，将***的拉栓 212的端头凸缘抱紧，产生自锁并转换为机械拉力，实现大拉力上锁状态。此时既有磁铁 221的吸合力，又有抱死滚珠 224 的机械力，从而达到上锁的目的，具有较大的上锁力。当锁体断电时，磁铁 221的磁场消失，止动环 223在弹簧 229的弹力作用下复位，带动磁铁 221移向基板 226并重新抵靠在基板 226上，这时止动环 223的大孔径部分包围套筒 222上的滚珠。当作用在铁板 211上的预拉力When the iron plate 211 receives an external force, the iron plate 211 drives the magnet 221 away from the substrate 226 due to the suction force between the iron plate 211 and the magnet 221, as shown in FIG. 4, so that the stop ring 223 overcomes the elastic force of the spring 229. The sleeve 222 is moved upward until the small aperture portion of the stop ring 223 surrounds the ball on the sleeve 222, and the plurality of balls on the sleeve 222 are pressed radially toward the center by the stop ring 223, The end flange of the inserted pull bolt 212 is tightly held, and is self-locked and converted into a mechanical tension to achieve a large tension locking state. At this time, both the suction force of the magnet 221 and the mechanical force of the ball 224 are locked, thereby achieving the purpose of locking, and having a large locking force. When the lock body is de-energized, the magnetic field of the magnet 221 disappears, and the stop ring 223 is reset by the elastic force of the spring 229, and the magnet 221 is moved toward the substrate 226 and rests on the substrate 226 again. At this time, the stop ring 223 is large. The aperture portion encloses the balls on the sleeve 222. When the pretension is applied to the iron plate 211

(预压力）低于规定的要求时，拉栓 212的端头凸缘从套筒 222中抽出，铁板 211与磁铁 221分离，实现开锁。由于弹簧 229的恢复力一定，当预拉力When the (pre-pressure) is lower than the prescribed requirement, the end flange of the pull pin 212 is withdrawn from the sleeve 222, and the iron plate 211 is separated from the magnet 221 to unlock. Since the restoring force of the spring 229 is constant, when the pretension is

(预压力）太大时弹簧力不足以将止动环 223复位，拉栓 212就不能够抽出故不能够开锁，所以只有当预拉力（预压力）低于规定值时才能够开锁。 When the (pre-pressure) is too large, the spring force is insufficient to reset the stop ring 223, and the pull bolt 212 cannot be pulled out, so that the lock cannot be unlocked, so that the lock can be unlocked only when the pre-tension (pre-pressure) is lower than the prescribed value.

Claims

权利要求书 Claim

1、一种避震机械磁力锁，包括：位于一侧的铁板 (211 )和从铁板 (211 ) 上垂直凸起的拉栓（ 212 )、以及位于另一侧的磁铁（ 221 )、位于磁铁 ( 221 ) 内并且顶部开口能够***拉栓（212) 的套筒（222)和套置在该套筒（222) ***的止动环（223 ) , 拉栓（212) 的端头形成凸缘，套筒（222)和止动环（223 )上具有互相配合调节该套筒（222) 内部空腔的孔径的机构，止动环（ 223 ) 固定在磁铁（221 )上，其特征在于，套筒（222)底部通过底部连接件（227)安装到磁铁（221) 下方的基板（226)上，磁铁 (221)和止动环（223 )能够相对于套筒（222)轴向移动，套筒（222)和止动环（223 ) 之间设有弹簧（229) 。 1. A shock absorber mechanical magnetic lock comprising: an iron plate (211) on one side and a pull bolt (212) vertically protruding from the iron plate (211), and a magnet (221) on the other side, a sleeve (222) located in the magnet (221) and having a top opening for inserting the pull bolt (212) and a stop ring (223) sleeved around the sleeve (222), the end of the pull bolt (212) is formed The flange, the sleeve (222) and the stop ring (223) have a mechanism for cooperating with an aperture for adjusting the inner cavity of the sleeve (222), and the stop ring (223) is fixed on the magnet (221), and the feature thereof The bottom of the sleeve (222) is mounted to the substrate (226) below the magnet (221) through the bottom connector (227), and the magnet (221) and the stop ring (223) are axially opposite to the sleeve (222). Moving, a spring (229) is provided between the sleeve (222) and the stop ring (223).

2、如权利要求 1所述的避震机械磁力锁，其特征在于，底部连接件（ 227 ) 一端固定在套筒（222)底部，另一端固定在基板 (226) 下面的垫块（225 ) 上，套筒（222)底部穿过基板（226)上的对应开口抵靠在垫块（125)上。 2. The suspension mechanical magnetic lock according to claim 1, wherein the bottom connecting member (227) has one end fixed to the bottom of the sleeve (222) and the other end fixed to the spacer (225) under the substrate (226). Upper, the bottom of the sleeve (222) abuts against the spacer (125) through a corresponding opening in the substrate (226).

3、如权利要求 2所述的避震机械磁力锁，其特征在于，基板（226)上对应开口的直径大于套筒（222)底部直径并且小于垫块（125)水平截面的最大直径。 3. The suspension mechanical magnetic lock of claim 2, wherein the diameter of the corresponding opening in the base plate (226) is larger than the diameter of the bottom of the sleeve (222) and smaller than the maximum diameter of the horizontal section of the spacer (125).

4、如权利要求 1或 2所述的避震机械磁力锁，其特征在于，底部连接件（227) 为螺釘。 4. A suspension mechanical magnetic lock according to claim 1 or 2, characterized in that the bottom connector (227) is a screw.

5、如权利要求 2所述的避震机械磁力锁，其特征在于，垫块（225 )的上下表面为弧形。 The shock absorber mechanical magnetic lock according to claim 2, wherein the upper and lower surfaces of the spacer (225) are curved.

6、如权利要求 1所述的避震机械磁力锁，其特征在于，套筒（222)上部开口边沿径向向外延伸形成凸缘。 6. The suspension mechanical magnetic lock of claim 1 wherein the upper opening edge of the sleeve (222) extends radially outwardly to form a flange.

7、如权利要求 6所述的避震机械磁力锁，其特征在于，套筒（222)开口处的凸缘的直径大于止动环（223 ) 的外壁直径。 7. A suspension mechanical magnetic lock according to claim 6, wherein the diameter of the flange at the opening of the sleeve (222) is larger than the diameter of the outer wall of the stop ring (223).

8、如权利要求 1所述的避震机械磁力锁，其特征在于，基板（226) 由铝槽构成。 The suspension mechanical magnetic lock according to claim 1, wherein the substrate (226) is formed of an aluminum groove.