CN112186237B

CN112186237B - Lithium cell installation is with battery device of taking that has anti-skidding structure

Info

Publication number: CN112186237B
Application number: CN202011234474.4A
Authority: CN
Inventors: 郭成
Original assignee: Hunan Baote Ruineng New Energy Co ltd
Current assignee: Hunan Baote Ruineng New Energy Co ltd
Priority date: 2020-11-07
Filing date: 2020-11-07
Publication date: 2022-05-31
Anticipated expiration: 2040-11-07
Also published as: CN112186237A

Abstract

The invention relates to the technical field of lithium battery installation, in particular to a battery taking device with an anti-skidding structure for lithium battery installation. According to the device, the telescopic rod can be pulled upwards through the pulling handle when the device is taken, the first rotating shaft and the second rotating shaft can be driven to separate the second rotating shaft from the clamping plates when the telescopic rod is pulled, the distance between the clamping plates can be adjusted, storage batteries with different sizes can be taken, the use convenience of the device is greatly improved, meanwhile, a worker can take the storage batteries by holding the anti-slip sleeve, the friction force between the device and a palm is increased, the device is more stable in taking, and the use safety of the device is greatly improved.

Description

Lithium cell installation is with battery device of taking that has anti-skidding structure

Technical Field

The invention relates to the technical field of lithium battery installation, in particular to a battery taking device with an anti-skidding structure for lithium battery installation.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution and using a lithium metal or a lithium alloy as a positive/negative electrode material, and can be roughly classified into two types: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was born in 1996, and the safety, specific capacity, self-discharge rate and cost performance of rechargeable batteries were all superior to those of lithium ion batteries. Due to the high technical requirement limit, only a few countries of companies produce the lithium metal battery, and the taking device matched with the lithium metal battery also becomes an indispensable using device.

However, the existing lithium battery taking device has the advantages that the lithium battery is anti-skidding and easy to fall off, the use effect of the lithium battery is easily influenced when the lithium battery falls off, and meanwhile, certain use safety hazards exist in the collided lithium battery, so that the lithium battery taking device with the anti-skidding structure is required to be designed for installation.

Disclosure of Invention

The invention aims to provide a battery taking device with an anti-skidding structure for lithium battery installation, which aims to solve the problems that the anti-skidding structure is easy to fall off, the use effect of a lithium battery is easy to be influenced when the lithium battery falls off, and the collided lithium battery has certain potential safety hazards in use.

In order to achieve the purpose, the invention provides the following technical scheme: a battery taking device with an anti-skidding structure for lithium battery installation comprises a device main body, wherein the device main body comprises a device box, a lithium battery main body and a pull handle, a taking mechanism is arranged in the device box and comprises a handle and a first contraction barrel, the two sides of the handle are fixedly connected with the first contraction barrel, telescopic rods are sleeved in the two groups of the first contraction barrels, one sides of the two groups of the telescopic rods are fixedly connected with slide bars, the surfaces of the two groups of the telescopic rods are sleeved with second contraction barrels, the two sides of the two groups of the second contraction barrels are provided with second slide rails, the slide bars are connected to the second slide rails in a sliding manner, one sides of the two groups of the slide bars are fixedly connected with first connecting rods, one sides of the two groups of the first connecting rods are movably connected with first rotating shafts, and one sides of the two groups of the first rotating shafts, which are close to the first rotating shafts, are fixedly connected with connecting blocks, two sets of one side swing joint of first pivot has the second connecting rod, and is two sets of one side of second connecting rod all fixedly connected with second pivot, and is two sets of one side all fixedly connected with splint of second pivot, two sets of the all fixedly connected with foam-rubber cushion of one end of splint, two sets of one side fixedly connected with first spring that the second pivot is close to mutually, fixed establishment has been seted up to one side of head rod, the inside of a shrink section of thick bamboo is provided with elevating system, fixture has been seted up to the inside of device case.

Preferably, a first sliding rail is arranged in the device box, a first sliding block is slidably mounted in the first sliding rail, a placing drawer is fixedly connected to one side of the first sliding block, a drying agent is placed in the placing drawer, and a pull handle is fixedly connected to one side of the placing drawer.

Preferably, the surface of the handle is sleeved with an anti-slip sleeve.

Preferably, the fixing mechanism comprises a second spring and a limiting plate, one side of the second shrinkage cylinder is fixedly connected with the limiting plate, the number of the limiting plates is two, the two limiting plates are fixedly connected with a transverse plate on one side of the limiting plate, a bolt is transversely inserted into the transverse plate, and a pull ring is fixedly connected to one side of the bolt.

Preferably, the surface of the bolt is sleeved with a second spring, and one side of the second spring is fixedly connected to the transverse plate.

Preferably, elevating system includes spacing groove and stopper, hollow section of thick bamboo has been seted up to the inside of first shrink section of thick bamboo, the spacing groove has been seted up on the surface of telescopic link, the inside fixedly connected with third spring of hollow section of thick bamboo, one side fixedly connected with stopper of third spring, stopper slidable mounting is on the spacing groove.

Preferably, fixture includes third slide rail and third slider, the third slide rail has been seted up to the inside of device case, the inside slidable mounting of third slide rail has the third slider, and the quantity of third slider is two, and is two sets of one side of third slider is first thread bush of fixedly connected with and second thread bush respectively, the internal thread of first thread bush and second thread bush is opposite, the internal thread connection of first thread bush and second thread bush has the lead screw, one side fixedly connected with second fixed plate of lead screw, one side fixedly connected with first fixed plate of lead screw, one side fixedly connected with of first fixed plate changes the handle, the surface of changeing the handle has cup jointed the rubber pad.

Preferably, one side of the second threaded sleeve is fixedly connected with a second clamping block, one side of the second clamping block is fixedly connected with a second protective pad, one side of the first threaded sleeve is fixedly connected with a first clamping block, and one side of the first clamping block is fixedly connected with a first protective pad.

Compared with the prior art, the invention has the beneficial effects that:

1. through being provided with the device case, lithium cell main part and pull handle, when the device is got and is used, accessible pull handle, upwards stimulate the telescopic link, can drive first pivot and second pivot during the telescopic link pulling and separate second pivot and splint, the interval of adjustable splint, can take the lithium cell main part of equidimension not, the convenience of device use has been promoted greatly, the staff takes through holding the antiskid cover simultaneously, the frictional force of device and palm has been increased, it is more stable when making the device take, the security of device use has been promoted greatly, closely laminate through foam-rubber cushion and device simultaneously, not only can increase the frictional force of device, make the better laminating of device, also can make the device leave wearing and tearing on lithium cell main part surface simultaneously, the practicality of device has been promoted greatly.

2. Through being provided with second spring and limiting plate, the pull ring is extracted to the accessible when the device debugs, makes bolt separation telescopic link, makes the telescopic link slide in the second slide rail, debugs the centre gripping distance of device, when the device is accomplished to the debugging of centre gripping distance, the accessible transversely inserts the telescopic link through the bolt and fixes the device debugging position, has promoted the stability that the device used greatly, has promoted the security when the device uses simultaneously.

3. Through being provided with spacing groove and stopper, when the device is using, the accessible stopper slides adjustable device's height at the spacing groove, when the device debugs highly the completion back, accessible stopper and spacing groove carry out the block, through a plurality of spacing grooves that the telescopic link surface was seted up, the stopper can carry out the block at the co-altitude not, can reach the fixed effect of device, makes the device adaptable to different operational environment, has promoted the practicality of device greatly.

4. Through being provided with third slide rail and third slider, when the device uses and removes, the accessible is rotatory to be close to second grip block and first grip block each other, can carry out the centre gripping with lithium cell main part, can make lithium cell main part prevent to collide with when removing and exert an influence to lithium cell main part's practical function, the security of device use has been promoted greatly, simultaneously through second grip block and first grip block be close to the second protection pad and the first protection pad that one side set up mutually, when can making second grip block and first grip block carry out the centre gripping fixed to the device, prevent wearing and tearing in lithium cell main part, to the influence that the device produced, further promotion lithium cell main part takes out the security of during operation.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic sectional front view of the structure of the picking mechanism of the present invention;

FIG. 3 is an enlarged view of a portion of the structure shown at B in FIG. 2 according to the present invention;

FIG. 4 is an enlarged cross-sectional view of a portion of the structure shown in FIG. 2;

FIG. 5 is a front sectional view of the clamping mechanism of the present invention;

FIG. 6 is a schematic side view of the structure of the present invention.

In the figure: 100. a device main body; 110. a device case; 111. a lithium battery main body; 112. pulling a handle; 113. a first slide rail; 114. a first slider; 115. a desiccant; 116. placing a drawer; 200. a fetching mechanism; 210. an anti-slip sleeve; 211. a first retraction cylinder; 212. a telescopic rod; 213. a slide bar; 214. a second slide rail; 215. a first connecting rod; 216. a first rotating shaft; 217. a second rotating shaft; 218. a splint; 219. a sponge cushion; 220. a first spring; 221. a second connecting rod; 222. connecting blocks; 223. a second shrink sleeve; 224. a grip; 300. a fixing mechanism; 310. a second spring; 311. a bolt; 312. a limiting plate; 313. a pull ring; 314. a transverse plate; 400. a lifting mechanism; 410. a limiting groove; 411. a limiting block; 412. a third spring; 413. a hollow cylinder; 500. a clamping mechanism; 510. a third slide rail; 511. a third slider; 512. a first threaded sleeve; 513. a screw rod; 514. a second threaded sleeve; 515. a first fixing plate; 516. turning a handle; 517. a rubber pad; 518. a second fixing plate; 519. a first clamping block; 520. a first protective pad; 521. a second protective pad; 522. and a second clamping block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention is shown:

a battery taking device with an anti-skid structure for installing a lithium battery comprises a device main body 100, wherein the device main body 100 comprises a device box 110, a lithium battery main body 111 and a pull handle 112, a taking mechanism 200 is arranged inside the device box 110, the taking mechanism 200 comprises a handle 224 and a first shrinkage cylinder 211, two sides of the handle 224 are fixedly connected with the first shrinkage cylinder 211, telescopic rods 212 are sleeved inside two groups of first shrinkage cylinders 211, one side of two groups of telescopic rods 212 are fixedly connected with a sliding rod 213, the surface of two groups of telescopic rods 212 is sleeved with the second shrinkage cylinder 223, two sides of two groups of second shrinkage cylinders 223 are respectively provided with a second sliding rail 214, the sliding rod 213 is slidably connected on the second sliding rail 214, one side of two groups of sliding rods 213 is fixedly connected with a first connecting rod 215, one side of two groups of first connecting rods 215 is movably connected with a first rotating shaft 216, one side of two groups of first rotating shafts 216 close to each other is fixedly connected with a connecting block 222, one side of two groups of first rotating shafts 216 is movably connected with a second connecting rod 221, one side of two groups of second connecting rods 221 is fixedly connected with a second rotating shaft 217, one side of two groups of second rotating shafts 217 is movably connected with a clamping plate 218, one end of two groups of clamping plates 218 is fixedly connected with a spongy cushion 219, one side of two groups of second rotating shafts 217 close to each other is fixedly connected with a first spring 220, one side of a first connecting rod 215 is provided with a fixing mechanism 300, the inside of a first shrinkage cylinder 211 is provided with a lifting mechanism 400, the inside of a device box 110 is provided with a clamping mechanism 500, when the device is used, the distance between lithium battery main bodies 111 to be clamped and taken by the device can be adjusted by pulling a handle 224, the lithium battery main bodies 111 with different sizes can be taken by the device, the convenience of the use of the device is greatly improved, and after the clamping is completed, the lithium battery can be reset by the first spring 220 to facilitate the next work, the working efficiency of the device is greatly improved.

Further, first slide rail 113 has been seted up to the inside of device case 110, the inside slidable mounting of first slide rail 113 has first slider 114, drawer 116 is placed to one side fixedly connected with of first slider 114, desiccant 115 has been placed to the inside of placing drawer 116, one side fixedly connected with of placing drawer 116 draws handle 112, when lithium cell main part 111 was placed in device case 110, accessible desiccant 115 keeps the interior dry environment of device case 110, it wets the electric leakage to place lithium cell main part 111, the convenience of device use has been promoted greatly, simultaneously, draw handle 112 through the pull and make first slider 114 slide in first slide rail 113, drawer 116 is placed to extractable first slider 114 one side fixedly connected, can change with desiccant 115 and clean, the convenience of device use has been promoted greatly.

Further, the surface of the grip 224 is sleeved with the anti-slip sleeve 210, when the device is used, a worker can increase the friction between the hand and the device by holding the anti-slip sleeve 210, and place the hands off when the device is used, so that the use safety of the device is greatly improved.

Further, fixed establishment 300 includes second spring 310 and limiting plate 312, one side fixedly connected with limiting plate 312 of the shrink section of thick bamboo 223 of second, the quantity of limiting plate 312 is two, one side fixedly connected with diaphragm 314 of two sets of limiting plates 312, the inside of diaphragm 314 transversely alternates there is bolt 311, one side fixedly connected with pull ring 313 of bolt 311, when the device uses, accessible bolt 311 transversely alternates second shrink section of thick bamboo 223 and telescopic link 212, reach fixed effect with the device, it is more stable when making the device use, the security of device has been promoted greatly.

Further, the second spring 310 has been cup jointed on the surface of bolt 311, and one side fixed connection of second spring 310 is on diaphragm 314, and the device is inside debugs when pulling pull ring 313, and after the debugging is accomplished, can send pull ring 313 open, resets bolt 311 through second spring 310 this moment, has promoted the convenience that the device used greatly.

Further, elevating system 400 includes spacing groove 410 and stopper 411, hollow section of thick bamboo 413 has been seted up to the inside of first shrink section of thick bamboo 211, spacing groove 410 has been seted up on the surface of telescopic link 212, the inside fixedly connected with third spring 412 of hollow section of thick bamboo 413, one side fixedly connected with stopper 411 of third spring 412, stopper 411 slidable mounting is on spacing groove 410, when the device uses, block in sliding on a plurality of spacing grooves 410 that the surface of telescopic link 212 was seted up through third slider 511, reach the lift effect of device, make the device can be applicable to different operational environment, the practicality of device has been promoted greatly.

Further, the clamping mechanism 500 includes a third slide rail 510 and a third slide block 511, the inside of the device case 110 is provided with the third slide rail 510, the inside of the third slide rail 510 is slidably provided with the third slide block 511, the number of the third slide blocks 511 is two, one side of each of the two sets of the third slide blocks 511 is fixedly connected with a first threaded sleeve 512 and a second threaded sleeve 514, the internal threads of the first threaded sleeve 512 and the second threaded sleeve 514 are opposite, the internal threads of the first threaded sleeve 512 and the second threaded sleeve 514 are connected with a screw 513, one side of the screw 513 is fixedly connected with a second fixing plate 518, one side of the screw 513 is fixedly connected with a first fixing plate 515, one side of the first fixing plate 515 is fixedly connected with a rotating handle 516, the surface of the rotating handle 516 is sleeved with a rubber pad 517, when the device is in use, the second clamping block 522 and the first clamping block 519 can be close to each other by rotating the rotating handle 516, so that the lithium battery main body 111 is kept fixed in the device, the convenience of the device use is greatly improved, and meanwhile, when the second clamping block 522 and the first clamping block 519 move close to each other, the third sliding block 511 arranged at the bottom slides in the third sliding rail 510, so that the moving process is smoother, and the convenience of the device is greatly improved.

Further, one side fixedly connected with second grip block 522 of second thread bush 514, one side fixedly connected with second protection pad 521 of second grip block 522, the first grip block 519 of one side fixedly connected with of first thread bush 512, the first protection pad 520 of one side fixedly connected with of first grip block 519, when the device uses, when second grip block 522 and first grip block 519 carry out the centre gripping to lithium cell main part 111, be close to the second protection pad 521 and the first protection pad 520 that one end set up through second grip block 522 and first grip block 519 closely laminating with lithium cell main part 111, can make lithium cell main part 111 reduce the wearing and tearing effect in the fixed process, the life of lithium cell main part 111 and the working effect of lithium cell main part 111 have been promoted greatly.

The working principle is as follows: when the working personnel is using the device, the handle 224 can be pulled through the access to drive the sliding rod 213 fixedly connected with one side of the telescopic rod 212 sleeved inside the first shrinkage cylinder 211 to slide in the second sliding rail 214, meanwhile, the first connecting rod 215 fixedly connected with one side of the sliding rod 213 is pulled backwards to drive the first rotating shaft 216 to rotate, the second connecting rod 221 can be pulled backwards when the first rotating shaft 216 rotates, when the second connecting rod 221 is pulled backwards, the second rotating shaft 217 is driven to rotate, the clamping plate 218 can be pulled backwards when the second rotating shaft 217 rotates, the distance effect of adjusting the clamping plate 218 is achieved, the lithium battery main bodies 111 with different sizes can be clamped and taken, meanwhile, the sponge cushion 219 fixedly connected with one end of the clamping plate 218 can clamp the lithium battery main bodies 111, the protection effect on the lithium battery main bodies 111 is achieved, and abrasion marks are prevented from being left.

When the staff is using this device, can extract telescopic link 212 with bolt 311 through pulling pull ring 313, make the device carry out the regulation of device interval, when adjusting the back of accomplishing, through inwards promoting pull ring 313, can transversely alternate the device through second shrink section of thick bamboo 223 and telescopic link 212, the second spring 310 is spacing with one side of diaphragm 314 with bolt 311 simultaneously, fixes the device, can take out the device this moment.

When the device is used by a worker, the limiting blocks 411 fixedly connected with the tops of the hollow cylinders 413 arranged in the first shrinkage cylinder 211 slide and are clamped in the limiting grooves 410 arranged on the surface of the expansion link 212 to lift the device, when the device is used, the limiting blocks 411 slide into the limiting grooves 410, the limiting blocks 411 can be pushed into the limiting grooves 410 through the elastic potential energy of the third springs 412, and when the device needs to be adjusted, the first shrinkage cylinder 211 can be pulled, so that the expansion link 212 downwards extrudes the third springs 412, and the limiting grooves 410 can slide on the surface of the expansion link 212 to lift the device in height.

When a worker uses the device, the lithium battery main body 111 is placed between the second clamping block 522 and the first clamping block 519, the rubber pad 517 is held to rotate the rotating handle 516 to drive the screw rod 513 to rotate, when the screw rod 513 rotates, the screw rod 513 is in threaded connection with the second threaded sleeve 514 and the third sliding block 511 to enable the second threaded sleeve 514 and the third sliding block 511 to move, because the threads of the second threaded sleeve 514 are opposite to those of the third sliding block 511, the second threaded sleeve 514 and the third sliding block 511 move close to each other, the second clamping block 522 and the first clamping block 519 are driven to move to achieve the effect of clamping the lithium battery main body 111, and when the screw rod is moved, the third sliding block 511 fixedly connected with the bottom of the first threaded sleeve 512 through the second threaded sleeve 514 slides in the third sliding rail 510, so that the moving process is smoother.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a lithium cell installation is with battery device of taking that has anti-skidding structure, includes device main part (100), its characterized in that: the device main body (100) comprises a device box (110), a lithium battery main body (111) and a pull handle (112), wherein a taking mechanism (200) is arranged in the device box (110), the taking mechanism (200) comprises a handle (224) and a first shrinkage cylinder (211), clamping plates (218) are tightly attached to two sides of the lithium battery main body (111), the two sides of the handle (224) are fixedly connected with the first shrinkage cylinder (211), two groups of first shrinkage cylinders (211) are sleeved with telescopic rods (212), one sides of the two groups of telescopic rods (212) are fixedly connected with sliding rods (213), the surfaces of the two groups of telescopic rods (212) are sleeved with second shrinkage cylinders (223), two sides of the two groups of second shrinkage cylinders (223) are respectively provided with second sliding rails (214), the sliding rods (213) are slidably connected to the second sliding rails (214), one sides of the two groups of the sliding rods (213) are respectively fixedly connected with first connecting rods (215), one side of the two groups of first connecting rods (215) is movably connected with a first rotating shaft (216), one side of the two groups of first rotating shafts (216) close to each other is fixedly connected with a connecting block (222), one side of the two groups of first rotating shafts (216) is movably connected with a second connecting rod (221), one side of the two groups of second connecting rods (221) is fixedly connected with a second rotating shaft (217), one side of the two groups of second rotating shafts (217) is movably connected with a clamping plate (218), one end of the two groups of clamping plates (218) is fixedly connected with a sponge cushion (219), one side of the two groups of second rotating shafts (217) close to each other is fixedly connected with a first spring (220), a fixing mechanism (300) is arranged on one side of the first connecting rod (215), a lifting mechanism (400) is arranged inside the first shrinkage cylinder (211), and a clamping mechanism (500) is arranged inside the device box (110);

the clamping mechanism (500) comprises a third sliding rail (510) and a third sliding block (511), the inside of the device box (110) is provided with the third sliding rail (510), the inside of the third sliding rail (510) is provided with the third sliding block (511), the number of the third sliding block (511) is two, one side of each of the two groups of the third sliding blocks (511) is fixedly connected with a first threaded sleeve (512) and a second threaded sleeve (514), the internal threads of the first threaded sleeve (512) and the second threaded sleeve (514) are opposite, the internal threads of the first threaded sleeve (512) and the second threaded sleeve (514) are connected with a lead screw (513), one side of the lead screw (513) is fixedly connected with a second fixing plate (518), one side of the lead screw (513) is fixedly connected with a first fixing plate (515), one side of the first fixing plate (515) is fixedly connected with a rotating handle (516), the surface of the rotating handle (516) is sleeved with a rubber pad (517).

2. The lithium battery installation is with battery device of taking with anti-skidding structure of claim 1, characterized in that: first slide rail (113) have been seted up to the inside of device case (110), the inside slidable mounting of first slide rail (113) has first slider (114), drawer (116) are placed to one side fixedly connected with of first slider (114), desiccant (115) have been placed to the inside of placing drawer (116), one side fixedly connected with of placing drawer (116) draws handle (112).

3. The lithium battery installation is with battery device of taking with anti-skidding structure of claim 1, characterized in that: an anti-slip sleeve (210) is sleeved on the surface of the grip (224).

4. The lithium battery installation is with battery device of taking with anti-skidding structure of claim 1, characterized in that: the fixing mechanism (300) comprises a second spring (310) and a limiting plate (312), one side of the second shrink cylinder (223) is fixedly connected with the limiting plate (312), the number of the limiting plates (312) is two, the two sets of limiting plates are fixedly connected with a transverse plate (314) on one side of the limiting plate (312), a bolt (311) is transversely inserted into the transverse plate (314), and a pull ring (313) is fixedly connected with one side of the bolt (311).

5. The lithium battery taking device with the anti-skidding structure for installation according to claim 4, wherein: and a second spring (310) is sleeved on the surface of the bolt (311), and one side of the second spring (310) is fixedly connected to the transverse plate (314).

6. The lithium battery installation is with battery device of taking with anti-skidding structure of claim 1, characterized in that: elevating system (400) include spacing groove (410) and stopper (411), hollow section of thick bamboo (413) have been seted up to the inside of a first shrink section of thick bamboo (211), spacing groove (410) have been seted up on the surface of telescopic link (212), the inside fixedly connected with third spring (412) of hollow section of thick bamboo (413), one side fixedly connected with stopper (411) of third spring (412), stopper (411) slidable mounting is on spacing groove (410).

7. The lithium battery installation is with battery device of taking with anti-skidding structure of claim 1, characterized in that: one side fixedly connected with second grip block (522) of second thread bush (514), one side fixedly connected with second protection pad (521) of second grip block (522), one side fixedly connected with first grip block (519) of first thread bush (512), one side fixedly connected with first protection pad (520) of first grip block (519).