TWM492050U - Garden shears with fast and effortless drive options - Google Patents

Description

Garden shears with fast and effortless drive options

This creation department is a kind of tool for gardening, especially a gardening shear that can be selected to be fast or labor-saving.

The existing gardening shears as shown in FIG. 8 are designed for relatively thick, tough and not easily cut branches, and include a force applying rod 60, a clamping rod 70, a blade 80 and a driving member. 90; wherein the clamping rod 70 is pivotally connected to the urging rod 60, the clamping rod 70 has a concave portion 71, the blade 80 is pivotally connected to the clamping rod 70, and the upper portion of the blade 80 is provided with a cutting edge 81, and the lower portion A sliding hole 82 is provided, which is an elongated hole and has a tooth portion 821 formed by a plurality of card slots. One end of the driving member 90 is connected to one end of the spring, and the other end of the spring is connected to the urging rod 60 to drive. The other end of the member 90 is provided with a slide bar 91 that is placed through the slide hole 82 of the blade 80. When operating the existing gardening shears, the user firstly holds the force applying rod 60 and the clamping rod 70 with both hands, and opens the force applying rod 60 and the clamping rod 70 to be placed on the sliding hole 82. The slide bar 91 slides to the bottom of the slide hole 82, causing the blade edge 81 of the blade 80 to rotate in a clockwise direction and separated from the crotch portion 71; then, the branch to be trimmed is placed between the crotch portion 71 and the blade edge 81, and then The urging rod 60 is closed with the clamping rod 70 by both hands. At this time, the sliding rod 91 abuts against the corresponding card slot of the tooth portion 821 of the sliding hole 82 in accordance with the diameter of the branch, and is staged during the trimming process. The ground is abutted at different positions of the tooth portion 821 to achieve the effect of segmental shearing.

The existing gardening shears provide a segmented shearing method, which allows the user to trim the larger diameter branches in a more labor-saving manner, but when trimming the smaller branches, the user is limited by the segmentation cutting mode. It is necessary to repeatedly relax and apply force to the urging rod 60 and the clamp rod 70 for trimming, and it is not possible to cut the small branch at one time, which is not only time consuming, but also causes inconvenience in trimming.

In order to solve the inconvenience of adjusting the trimming mode of the existing gardening shears to match the diameter of the branches, the present invention creates a switcher for the quick-acting and labor-saving driving option, and provides the user with a quick and labor-saving driving option. The mode of trimming can be switched according to requirements.

The present invention solves the technical problem of the gardening shear with quick and labor-saving driving selection, comprising: a force applying rod comprising a through groove extending downward from the upper end of the force applying rod; a clamping rod, which is worn The shank is pivotally connected to the urging rod, and the clamping rod includes a shank disposed on the upper portion of the clamping shank, and a blade slot extending downward from the lower end of the shank; The blade is inserted into the blade and is pivotally connected to the clamping rod. The blade is divided into upper and lower sections. The blade comprises a cutting edge disposed on the upper section of the blade, and an elongated shape disposed on the lower section of the blade. a sliding hole having a flat surface with a smooth surface on the inner circumferential surface on the same side of the cutting edge, and a tooth portion on the inner circumferential surface of the other side, the tooth portion being connected to form a wave shape a driving slot, one end of which is disposed at the slot and pivoted to a side of the biasing rod opposite to the clamping rod and the other end is slidably coupled to the sliding hole, the driving member is pivoted One end of the connecting body is connected with a spring, the spring is disposed inside the force applying rod and is connected to the other end a force bar is coupled, the spring force of the spring acts on the pivoting end of the driving member to keep the sliding end biased upward; and a switch is coupled to the force applying rod and has a block for engaging the switch The block is located in the yaw path of the drive member to form a barrier.

The gardening shear has a quick and labor-saving driving option, wherein the switch is disposed below the pivoting portion of the driving member, and includes a connecting plate and two side plates fixed on two sides of the connecting plate, and the two side plates The two sides of the urging rod parallel to the blade are adjacent to a position on the side opposite to the urging rod and the clamping rod.

The gardening shear with quick and labor-saving driving selection, wherein the clamping block is fixed on the upper edge of the connecting plate and disposed between the two side plates, and the urging rod is opposite to the clamping rod One side of the switch is provided with a block through hole matching the block, and is disposed above the pivotal connection of the switch and within a range of rotation of the switch. When the switch is engaged, the block is worn. Pass through the block through hole.

The gardening shear with quick and labor-saving driving selection, wherein the urging rod is provided with a post protruding from a side of the urging rod parallel to the blade, and the side panel is provided with a matching engagement of the post Card hole.

The gardening shear with quick and labor-saving driving selection, wherein the card post is set to two, and the two posts are respectively disposed on two sides of the urging rod parallel to the blade, and the card holes are correspondingly arranged. There are two, and the two hole holes are respectively disposed on the two side plates.

The garden shear has quick and labor-saving driving options, wherein the force applying rod is provided with a switch block.

The gardening shear with quick and labor-saving driving selection, wherein the switch block is disposed below the through hole of the block and is located within a range of rotation of the switch, and when the switch is opened, the switch is closed The link plate of the switch.

The enhancements obtained by the technical means of the creation are as follows: 1. The gardening shear with the quick and labor-saving driving choice of the creation is provided with a toggle switch for the user to switch the trimming mode according to the trimming condition. Solving the problem that the existing gardening shears can't switch the trimming, and the time-consuming and inconvenient shortcomings when trimming the twigs, the creation can save both labor and time. 2. This creation sets the post on the force-applying rod, and sets the card hole in the switch, and fixes the position of the switch by the mutual engagement of the post and the card hole, so that the creation is not converted by accidentally touching the switch. The trimming mode, this creation is more than the force bar to set the switch block, which can further limit the opening of the switch.

In order to understand in detail the technical features and practical functions of the present creation, and can be implemented in accordance with the present creation content, the following further describes the preferred embodiment as shown in the following figure:

As shown in FIG. 1 , the garden shears provided by the present invention with quick and labor-saving driving options include: a force applying rod 10, a clamping rod 20, a blade 30, a driving member 40 and a switch 50; The blade 30 is pivotally connected to the clamping rod 20, and the clamping rod 20 is pivotally connected to the urging rod 10. The driving member 40 is pivotally connected to the urging rod 10, and one end is connected to the elastic member and the other end is slidable. The switch is connected to the blade 30, and the switch 50 is pivotally connected to the urging rod 10.

As shown in FIG. 2, the urging rod 10 has a rod shape, and two sides perpendicular to the blade 30 are divided into an outer side and an inner side, and two sides parallel to the blade 30 are divided into the opposite sides of the clamping ram 20. The opposite side, and the opposite side opposite to the opposite side, the force applying rod 10 includes a through slot 11, a clamping rod pivot hole 12, a driving member pivot hole 13, a fixing rod through hole 14, and a spring fixing rod. 15. A card block through hole 16, a switch block 17, a switch pivot hole 18 and two pin posts 19; wherein the through slot 11 is an elongated slot extending downward from an upper end of the force applying rod 10, A short opening 111 is formed at the opposite end of the urging rod 10, and a long opening is formed on the opposite side of the urging rod 10, and the long opening extends downward from the upper end of the urging rod 10 to the upper portion of the urging rod 10. The clamping rod pivot hole 12 is disposed at a position adjacent to the upper end of the urging rod 10, and is an opening penetrating through the through groove 11 through the inner and outer sides of the urging rod 10, and the driving member pivot hole 13 is penetrated The inner and outer sides of the force applying rod 10 and the opening passing through the through slot 11 are located below the clamping rod pivot hole 12 and adjacent to the force applying rod 10 In the side position, the fixing rod through hole 14 is also an opening penetrating through the inner and outer sides of the force applying rod 10 and passing through the through groove 11. The fixing rod through hole 14 is located at the clamping rod pivot hole 12 and the driving member pivot Below the hole 13, and spaced apart from the drive member pivot hole 13, the spring fixing rod 15 is a cylinder having a diameter matching the fixing rod through hole 14 and penetrating the fixing rod through hole 14.

As shown in FIG. 2 and FIG. 3, the block through hole 16 is disposed below the short opening 111, and is formed by a square hole formed by the back of the urging rod 10 passing through the through slot 11. The block 17 is located on the opposite side of the urging rod 10 , and is an arc-shaped protrusion disposed under the block through hole 16 for the switch 50 to abut. The switch pivot hole 18 extends through the urging rod 10 . The inner and outer sides, the position of the switch pivot hole 18 should be matched with the switch 50 and the block through hole 16 to enable the switch 50 to achieve the effect of switching the trim mode, and the two posts 19 are self-contained. The inner and outer sides of the urging rod 10 face outwardly protruding two cylinders, and the positions of the two posts 19 are matched with the switch pivot hole 18 and the changeover switch 50, and can be arranged when the switch 50 is engaged with the switch Prevents trim mode switching due to accidental touch.

As shown in FIG. 2, the clamping rod 20 is a wider rod body of the upper section, and the two sides perpendicular to the blade 30 are divided into an outer side and an inner side, and the two sides parallel to the blade 30 are divided into the clip. The opposite side of the mast 20, and the opposite side opposite the opposite side, the clamping rod 20 includes a jaw portion 21, a blade slot 22, a blade pivot hole 23 and a clamping lever pivot 24 Wherein the crotch portion 21 is formed by a wide portion of the upper portion of the clamping rod 20, and a notch is formed in a direction away from the opposite side of the upper portion of the clamping rod 20 toward the force applying rod 10, the crotch portion The 21 series includes a pivot portion 211 located on the opposite side of the lower end of the crotch portion 21, and is formed by recessing the inner and outer sides of the crotch portion 21, the thickness of the pivot portion 211 corresponding to the force applying rod 10 Provided by the slot 11 , the pivot portion 211 is provided with a circular pivot through hole 2111 adjacent to the opposite side edge of the jaw portion 21; the blade through slot 22 extends downward from the lower end of the jaw portion 21, The blade passes through the groove 22 and forms an opening on the opposite side and the opposite side of the clamping bar 20 to allow the blade 30 to pass through. The blade pivot hole 23 is disposed at the bottom of the jaw portion 21. The inner and outer sides of the clamping rod 20 extend through the opening of the inserting slot 22, and the clamping rod pivot 24 has a diameter matching the clamping rod pivot hole 12 and the pivot portion 211. The cylinder of the pivot through hole 2111 is provided.

As shown in FIG. 2, the blade 30 is a curved piece divided into upper and lower sections, and has opposite sides of the urging rod 10, and opposite opposite sides. The blade 30 includes a cutting edge 31 and a a sliding hole 32, a pivoting through hole 33 and a blade pivot 34; wherein the cutting edge 31 is curved and disposed on an opposite side of the upper portion of the blade 30, the sliding hole 32 is disposed in the lower portion of the blade 30 and is close to An elongated hole at the opposite side edge of the blade 30, the sliding hole 32 has a long inner circumferential surface, wherein the sliding hole 32 is provided with a flat portion 321 near the inner circumferential surface of the opposite side of the blade 30, which has smoothness The inner peripheral surface of the other side is defined as a tooth portion 322 which is provided with a plurality of card slots which are connected to form a wave shape, and the pivot through hole 33 is a circular hole which is disposed at a middle position of the blade 30. The blade pivot 34 is a cylinder having a diameter matching the blade pivot hole 23 and the pivot through hole 33 of the blade 30.

As shown in FIG. 2, the driving member 40 is formed by two elongated side plates 401 fixed on two sides of a baffle 402, and includes a spring mounting portion 41, a pivot through hole 42, and a driving member pivot 43. a sliding rod through hole 44, a sliding rod 45 and a spring 46; wherein the spring mounting portion 41 is located at one end of the driving member 40, and is provided by two openings of the baffle 402, the pivot through hole 42 is located at the same end of the spring mounting portion 41 as a circular hole extending through the two elongated side plates 401. The driving member pivot 43 is a driving member pivot hole 13 and a driving member provided with a diameter matching the force applying rod 10. a cylinder of a pivoting through hole 42 of the 40, the sliding rod through hole 44 is located at the other end opposite to the pivot through hole 42 and is a circular hole penetrating the two elongated side plates 401, and the sliding rod 45 is diametrically matched to the sliding rod The cylinder of the through hole 44 is connected to the spring mounting portion 41 at one end and to the spring fixing rod 15 provided by the urging rod 10 at the other end.

As shown in FIG. 2 and FIG. 3, the switch 50 is used to block the reset of the driving member 40, and includes two side plates 51, a connecting plate 52, a pivot through hole 53, a block 54 and a switch pivot. a shaft 55; wherein the two side plates 51 are two-plate bodies of approximately triangular shape and are respectively fixed on two sides of the connecting plate 52, and the two side plates 51 are respectively disposed opposite to the two clamping posts 19 provided by the urging rod 10. There is a card hole 511. The switch switch 50 is provided with a circular through hole 53 extending through the two apexes of the side plate 51 at the lower end of the side plate 51. The block 54 is disposed between the two side plates 51. And being fixed to the upper edge of the connecting plate 52, the switch pivot 55 is a small cylinder having a diameter matching the pivot through hole 53 of the changeover switch 50 and the switch pivot hole 18 of the force applying rod 10.

As shown in FIG. 1 and FIG. 2, when assembling, the blade 30 is first inserted into the blade slot 22 of the clamping rod 20, and the pivot through hole 33 of the blade 30 is aligned with the blade of the clamping rod 20. The pivot hole 23 is inserted into the blade pivot hole 23 and the pivot through hole 33 by the blade pivot 34, so that the blade 30 is pivotally connected to the clamping rod 20; and the spring of the force applying rod 10 is fixed again. The rod 15 is inserted into the fixing rod through hole 14 of the urging rod 10, and the spring 46 provided by the driving member 40 is disposed in the through slot 11 of the urging rod 10, and one end of the spring 46 is fixed to The spring fixing rod 15 then penetrates the driving member 40 into the through slot 11 of the urging rod 10, so that the pivot through hole 42 of the driving member 40 is aligned with the driving member pivot hole 13 of the urging rod 10, and the driving The driving member pivot 43 of the member 40 is inserted into the driving member pivot hole 13 and the pivot through hole 42, the driving member 40 is pivotally connected to the urging rod 10, and the other end of the spring 46 is fixed. The spring mounting portion 41 of the driving member 40; the pivot portion 211 of the clamping rod 20 is inserted into the upper end of the slot 11 of the urging rod 10, and the pivoting through hole 2111 of the clamping rod 20 Aligning the urging rod 1 The clamping rod pivot hole 12 of the clamping rod 12 is inserted into the clamping rod pivot hole 12 and the pivoting through hole 2111 by the clamping rod pivot 24 provided by the clamping rod 20, and the clamping rod 20 is pivoted Connected to the urging rod 10; then, the sliding rod 45 provided by the driving member 40 is placed on the sliding rod through hole 44 and the sliding hole 32 provided by the blade, and finally the switching switch 50 is placed on the urging rod 10, and the pivot through hole 53 of the changeover switch 50 is aligned with the switch pivot hole 18 of the urging rod 10, and the switch pivot 55 of the changeover switch 50 is inserted into the pivot through hole 53 and the switch pivot hole 18, that is, the assembly of garden shears with rapid and labor-saving driving options.

As shown in FIG. 4 and FIG. 5, when the changeover switch 50 is engaged, the switch is switched to the labor-saving mode in which the segmentation is cut, and the block 54 of the changeover switch 50 is inserted into the block provided by the force-applying rod 10. The through hole 16 , the baffle 402 of the driving member 40 abuts against the block 54 inserted into the block through hole 16 , so that the driving member 40 cannot be rotated in the counterclockwise direction by the elastic force of the spring 46 . When the user wants to trim the branches, the force applying rod 10 and the clamping rod 20 are first held by both hands, and the force applying rod 10 and the clamping rod 20 are opened, since the driving member 40 cannot be counterclockwise. The direction is rotated, so that the sliding rod 45 penetrating the sliding hole 32 of the blade 30 is along the flat portion 321 of the sliding hole 32, and is slid from the upper end of the sliding hole 32 to the lower end, so that the blade 31 of the blade 30 is The blade pivot 34 rotates clockwise for the fulcrum and is separated from the jaw portion 21, and then the opening of the jaw portion 21 and the blade 30 is fitted into the branch to be trimmed, and the force is applied by the two hands. The rod 10 is assembled with the clamping rod 20, and the sliding rod 45 penetrating the sliding hole 32 of the blade 30 abuts against the corresponding slot of the tooth portion 322 of the sliding hole 32, and the sliding rod 45 will The lower section of the blade 30 is pushed back to the side so that the upper section of the blade 30 is rotated counterclockwise with the blade pivot 34 as a fulcrum for shearing, while the sliding lever 45 of the driving member 40 is pushed by the lower section of the blade 30. Squeezing, the driving member 40 is rotated clockwise with the driving member pivot 43 as a fulcrum, and the driving member 40 is fixed to the spring 46. The spring 46 is tensioned at one end, and when the user relaxes the force applying rod 10 and the clamping rod 20 again, the spring 46 is reset by the pulling force, and the driving member 40 is pivoted with the sliding rod 45 by the driving member. 43 is a counterclockwise rotation of the fulcrum, so that the sliding rod 45 is disengaged from the slot of the tooth portion 322, and is prepared for the user's next force application, thereby relaxing and applying force to the urging rod 10 When the mast 20 is clamped, the sliding rod 45 is stepped against the corresponding slot of the tooth portion 322 during the trimming process, and is cut in a segmented manner. As shown in FIG. 3, when the user selects the switching switch 50 to select the labor saving mode of the segment cutting, the card hole 511 provided in the switching switch 50 can be snapped to the post provided by the urging rod 10. 19, by the card hole 511 and the post 19 being engaged with each other, it is possible to prevent the user from accidentally touching the changeover switch 50 and switching the trim mode.

As shown in FIG. 6 and FIG. 7 , when the changeover switch 50 is turned on, that is, switching to the fast mode of the present creation, since the block 54 of the changeover switch 50 no longer abuts against the baffle 402 of the drive member 40, and One end of the driving member 40 receives the pulling force of the spring 46, so that the sliding rod 45 provided at the other end is held at the upper end of the sliding hole 32; when cutting, the user first applies the force applying rod 10 to the clamping rod 20 Opening, the lower portion of the blade 30 is pulled by the sliding rod 45, and the blade 31 of the blade 30 is rotated in a clockwise direction to be separated from the crotch portion 21, and then the branch to be trimmed is placed on the crotch portion. Between the 21 and the cutting edge 31, the urging rod 10 is then closed with the clamping rod 20, and the sliding rod 45 provided at the other end of the driving member 40 is held at the top of the sliding hole 32, thereby enabling the user Cut the branches at once and perform the cutting work efficiently. When the switch 50 is opened, the switch block 17 is restrained against the connecting plate 52 of the switch 50 to achieve the effect of limiting the opening range of the switch 50.

10‧‧‧Power rod
11‧‧‧through slot
111‧‧‧Short opening
12‧‧‧Clamping rod pivot hole
13‧‧‧ drive member pivot hole
14‧‧‧Fixed rod perforation
15‧‧‧Spring rod
16‧‧‧Clock through hole
17‧‧‧Switch block
18‧‧‧Switch hole
19‧‧‧clamp
20‧‧‧Clamping mast
21‧‧‧颚
211‧‧‧Band
2111‧‧‧Pivot through hole
22‧‧‧ Blade slot
23‧‧‧Blade hole
24‧‧‧Clamping mast pivot
30‧‧‧blade
31‧‧‧ Blade
32‧‧‧Slide hole
321‧‧‧ Straight
322‧‧‧ teeth
33‧‧‧Pivot through hole
34‧‧‧blade pivot
40‧‧‧ Drives
401‧‧‧Long side panels
402‧‧‧Baffle
41‧‧‧Spring Mounting Department
42‧‧‧Pivot through hole
43‧‧‧Drive Pivot
44‧‧‧Sliding rod perforation
45‧‧‧Sliding rod
46‧‧‧ Spring
50‧‧‧Toggle switch
51‧‧‧ side panels
511‧‧‧Kakong
52‧‧‧Link board
53‧‧‧Pivot through hole
54‧‧‧ card block
55‧‧‧Switch pivot
60‧‧‧ struts
70‧‧‧Clamping mast
71‧‧‧颚
80‧‧‧blade
81‧‧‧blade
82‧‧‧Slide hole
821‧‧‧ teeth
90‧‧‧ Drives
91‧‧‧Sliding rod

Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded view of the preferred embodiment of the present invention. Figure 3 is a partial cross-sectional view of the preferred embodiment of the present invention. Figure 4 is a cross-sectional view showing the closing of the force applying rod and the clamping jaw in the labor saving mode of the preferred embodiment of the present invention. Fig. 5 is a cross-sectional view showing the opening of the force applying rod and the clamping jaw in the labor saving mode of the preferred embodiment of the present invention. Figure 6 is a cross-sectional view showing the closing of the force applying rod and the clamping jaw in the quick mode of the preferred embodiment of the present invention. Figure 7 is a cross-sectional view showing the application of the force applying rod and the clamping jaw in the quick mode of the preferred embodiment of the present invention. Figure 8 is a perspective view of a prior gardening shear.

10‧‧‧Power rod

11‧‧‧through slot

111‧‧‧Short opening

12‧‧‧Clamping rod pivot hole

13‧‧‧ drive member pivot hole

14‧‧‧Fixed rod perforation

15‧‧‧Spring rod

16‧‧‧Clock through hole

17‧‧‧Switch block

18‧‧‧Switch hole

19‧‧‧clamp

20‧‧‧Clamping mast

21‧‧‧颚

211‧‧‧Band

2111‧‧‧Pivot through hole

22‧‧‧ Blade slot

23‧‧‧Blade hole

24‧‧‧Clamping mast pivot

30‧‧‧blade

31‧‧‧ Blade

32‧‧‧Slide hole

321‧‧‧ Straight

322‧‧‧ teeth

33‧‧‧Pivot through hole

34‧‧‧blade pivot

40‧‧‧ Drives

42‧‧‧Pivot through hole

43‧‧‧Drive Pivot

44‧‧‧Sliding rod perforation

45‧‧‧Sliding rod

46‧‧‧ Spring

50‧‧‧Toggle switch

51‧‧‧ side panels

511‧‧‧Kakong

52‧‧‧Link board

53‧‧‧Pivot through hole

54‧‧‧ card block

55‧‧‧Switch pivot

Claims (7)

A garden shear with quick and labor-saving driving options, comprising: a force applying rod comprising a through groove extending downward from an upper end of the force applying rod; a clamping rod disposed at an upper end of the through groove Pivoting the urging rod, the nipper includes a shank disposed on the upper portion of the nipple, and a blade slot extending downward from the lower end of the shank; a blade penetrating the blade The blade is pivotally connected to the clamping rod, and the blade is divided into upper and lower sections. The blade comprises a cutting edge disposed on the upper section of the blade, and an elongated sliding hole disposed in the lower section of the blade, the sliding hole a flat portion having a smooth surface is provided on the inner peripheral surface on the same side of the cutting edge, and a tooth portion is provided on the inner peripheral surface of the other side, and the tooth portion is provided with a plurality of card slots which are connected to form a wave shape; One end of the driving member is pivotally connected to the sliding hole and the other end is slidably coupled to the sliding hole, and the driving member is connected with a spring at one end of the pivoting end. The spring is disposed inside the force applying rod and is biased at the other end a rod is coupled, the spring force of the spring acts on the pivoting end of the driving member to keep the sliding end biased upward; and a switch is coupled to the force applying rod and has a block when the switch is engaged The block is located at a yaw path of the drive member to form a barrier. The gardening shear according to claim 1, wherein the switch is disposed below the pivotal portion of the driving member, and includes a connecting plate and two side plates fixed on both sides of the connecting plate. The two side plates are pivotally connected to the two sides of the urging rod parallel to the blade, and are close to a position on the side of the urging rod and the clamping yoke. The gardening shear of the quick and labor-saving driving selection according to claim 2, wherein the block is fixed on the upper edge of the connecting plate and disposed between the two side plates, and the urging rod is opposite to the side One side of the clamping rod is provided with a card through hole matching the clamping block, and is disposed above the pivoting position of the switching switch and located within a range of rotation of the switching switch. When the switching switch is engaged, The block passes through the block through hole. A garden shear according to claim 3, wherein the force-applying rod is provided with a post protruding from a side of the force-applying rod parallel to the blade, and the side panel is provided with a matching card. Fit the card hole of the post. The horticultural scissors with quick and labor-saving driving selection as described in claim 4, wherein the shank is set to two, and the two posts are respectively disposed on two sides of the urging rod parallel to the blade, the The card holes are correspondingly set to two, and the two card holes are respectively disposed on the two side plates. A garden shear according to claim 5, which has a quick and labor-saving drive selection, wherein the force-applying rod is provided with a switch stop. The gardening shear of the fast and labor-saving driving selection according to claim 6, wherein the switch block is disposed below the through hole of the block and is located within a range of rotation of the switch, when the switch is opened , against the link plate of the switch.