Blade puncher capable of adjusting punching size

Abstract

The utility model relates to the field of punchers, in particular to a blade puncher capable of adjusting punching size, which comprises a shell, the shell comprises a top plate, a bottom plate and upright posts, the top plate is connected with the bottom plate through the upright posts, the blade puncher further comprises a punching component mounted in the shell, the punching component comprises a punching part, one side of the punching part is connected with the top plate, and the other side of the punching part faces the bottom plate; the punching piece is driven by the top plate and moves towards the bottom plate through the compression stand columns. The adjusting part is connected with the punching part and adjusts the hole diameter of the punching part. During use, a blade needing to be sampled is placed in the puncher, the top plate is pressed, and the height of the stand column is compressed by the top plate, so that the punching piece is driven to punch the blade; when the punching size needs to be adjusted, the adjusting piece is used for adjusting the punching size of the punching piece. The utility model has the advantages that the punching size can be adjusted, the volume is small, the carrying is convenient, and the leaves can be temporarily stored and observed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of puncher, concretely relates to a blade puncher of adjustable punching size. BACKGROUND

[0002] In biological research, it is often necessary to sample plant leaves, and most plant leaves need to be collected in the wild. Most of the existing plant leaf punchers have fixed hole diameters, and some punchers adjust the punching size by switching different diameter cutter heads. The existing plant leaf puncher occupies a large space, is inconvenient to use and not portable, which brings inconvenience to the field sampling of plant leaves.

[0003] At the same time, the existing plant leaf puncher has few functions of temporary storage and observation of leaves, and needs additional tools for storage and observation, which is not conducive to the development of work after plant leaf sampling.

[0004] Therefore, a blade puncher with adjustable punching size is needed to solve the problems of fixed punching hole diameter, inconvenience of carrying and large volume of the existing puncher.

[0005] Similarly, a blade puncher is also needed to solve the problem of difficulty in temporary storage and observation of leaves of the existing puncher. SUMMARY

[0006] The utility model provides a blade puncher with adjustable punching size, which has the advantages of adjustable punching size, small volume, convenient carrying, temporary storage and observation of leaves, and solves the problems in the prior art.

[0007] A blade puncher with adjustable punching size, comprising a shell, the shell comprising a top plate, a bottom plate and a stand, the top plate being connected to the bottom plate through the stand, further comprising a punching assembly installed in the shell, the punching assembly comprising:

[0008] A punching member connected to one side of the top plate and facing the bottom plate, the punching member being driven by the top plate and moving towards the bottom plate by compressing the stand;

[0009] An adjusting member connected to the punching member and adjusting the hole diameter of the punching member.

[0010] In use, the leaves to be sampled are placed in the puncher, the top plate is pressed, the height of the stand is compressed, thereby driving the punching member to punch the leaves; when the size of the punch hole needs to be adjusted, the adjusting member is used to adjust the punching size of the punching member.

[0011] With such a structure, the punching size can be conveniently adjusted, and the utility model does not need to replace different punching members when changing the punching size, thereby saving space and facilitating carrying.

[0012] Further, the punching member comprises:

[0013] A steel strip, which is a long thin piece with elasticity, is fixed at one end to the top plate, and forms a circular ring around the fixed end, and is connected to the adjusting member at the other end; the adjusting member adjusts the size of the circular ring by tightening or releasing the other end of the steel strip.

[0014] In use, the top plate is pressed to drive the steel strip, and the circular ring of the steel strip punches the leaf. When the hole diameter of the punch needs to be reduced, the adjusting member is operated to pull the steel strip tight; because the steel strip is elastic, the force on the circular ring increases, and the radius of the circular ring decreases, thereby reducing the hole diameter of the punch. When the hole diameter of the punch needs to be enlarged, the adjusting member is operated to push back and release the steel strip, the force on the circular ring decreases, and the radius of the circular ring increases, thereby increasing the hole diameter of the punch.

[0015] With this structure, the hole diameter of the punch is adjusted by tightening or releasing the steel strip by operating the adjusting member, without the need to replace different punching members, making the utility simple to operate, small in size, and easy to carry.

[0016] Further, the adjusting member comprises:

[0017] The driving knob comprises a first rotating shaft and a driving gear fixedly sleeved on the first rotating shaft, and the first rotating shaft is fixedly connected to the shell,

[0018] The steel strip comprises a first tooth portion arranged in the length direction thereof, and the first tooth portion is engaged with the driving gear.

[0019] When the punching member needs to be adjusted, the driving knob is rotated, the driving knob drives the driving gear to rotate, and because the driving gear is engaged with the first tooth portion of the steel strip, the driving knob drives the steel strip to move, thereby tightening or releasing the steel strip, and finally adjusting the size of the circular ring.

[0020] With this structure, the size of the circular ring can be conveniently controlled by the driving knob. Because the process of adjusting the circular ring is continuously changed, the needs of users for different hole diameters can be more accurately met.

[0021] Further, the adjusting member further comprises a driven knob, which comprises a second rotating shaft and a driven gear fixedly sleeved on the second rotating shaft, and the second rotating shaft is fixedly connected to the shell,

[0022] The driving knob and the driven knob clamp the steel strip.

[0023] With this structure, the steel strip can be more stably controlled by clamping the driving knob and the driven knob, avoiding decoupling between the steel strip and the adjusting member and affecting use.

[0024] Further, the adjusting member further comprises a limiting member, which is detachably connected to the top plate and engaged with the first toothed portion.

[0025] With such a structure, after the size of the annular ring is adjusted, the limiting member is fixed to the top plate, and the steel bar is fixed due to the engagement between the limiting member and the first toothed portion, so that the size of the hole is not changed accidentally during the punching process.

[0026] On the other hand, as another improvement of the present application, the punching member comprises:

[0027] The punching needle group comprises at least two punching needles, the tip of the punching needle is directed towards the bottom plate, and the other end of the punching needle is connected to the top plate,

[0028] The connecting member comprises two sides movably connected around the intersection, the connecting member is X-shaped, and the connecting member connects the adjacent two punching needles,

[0029] The adjusting member comprises an adjusting knob and a second spring, one end of the second spring is connected to the adjusting knob, the other end of the second spring is connected to the punching needle, and the second spring is stretched and contracted with the rotation of the adjusting knob.

[0030] In use, the top plate is pressed, the punching needle group penetrates the leaf to be sampled, then the top plate is released, the angle of the punching needle group or the leaf is rotated, the top plate is pressed again to make the punching needle group penetrate the leaf to be sampled, and the punching of the leaf to be sampled is completed through repeated operations.

[0031] When the hole diameter of the punching needs to be adjusted, the adjusting member is adjusted, the adjusting knob is rotated, when the hole diameter of the punching needs to be enlarged, the adjusting knob is rotated in one direction, the second spring is elongated, the second spring drives the punching needle to move, the distance between the punching needles in the punching needle group is enlarged, and the hole diameter of the punching is increased; similarly, when the hole diameter of the punching needs to be reduced, the adjusting knob is rotated in the other direction, the second spring 53 is wound around the adjusting knob 52 by rotation, so as to be contracted under stress, the punching needle 511 is driven to move inward, the distance between the punching needles 511 in the punching needle group 51 is reduced, and the hole diameter of the punching is reduced.

[0032] With such a structure, the volume of the present application can be further reduced, and the operation is simple and convenient to carry.

[0033] Further, the stand column comprises:

[0034] a first spring,

[0035] an upper stand column, one end of which is fixedly connected to the top plate, and the other end of which is connected to the first spring,

[0036] The lower stand is fixedly connected with the bottom plate at one end and connected with the first spring at the other end.

[0037] With the structure, when the puncher is pressed, the top plate and the bottom plate drive the upper stand and the lower stand respectively, and then the first spring is compressed. After the punching is completed, the puncher is released, and the first spring pushes the top plate and the bottom plate to automatically reset.

[0038] Further, the lower stand is provided with a groove for accommodating the first spring, the inner diameter of the groove is greater than the outer diameter of the upper stand, and the outer diameter of the upper stand is greater than the inner diameter of the first spring.

[0039] Further, the punch assembly comprises first punchers and second punchers, the first punchers are installed on the top plate, the second punchers are installed on the bottom plate, and the positions of the first punchers and the second punchers correspond to each other.

[0040] The leaf to be sampled is placed between the first punchers and the second punchers, the first punchers and the second punchers move relatively, and the leaf to be sampled is punched by shearing. With the structure, the punching edge is more distinct, the punching effect is improved, and the sampling effect of the sampling part of the leaf is improved.

[0041] Further, the inner diameter of the second puncher is greater than the outer diameter of the first puncher.

[0042] Further, it further comprises an observation part, the observation part is a hollow transparent part, which is installed outside the bottom plate and corresponds to the position of the puncher, the bottom plate is connected with the observation part, and a through hole is formed at the connection position, and the inner diameter of the through hole is greater than the maximum outer diameter of the puncher.

[0043] With the structure, after the punching is completed, the sampling part of the leaf enters the observation part, and the sampling part and the part to be sampled of the leaf can be more conveniently observed. Similarly, the observation part can temporarily store the leaf.

[0044] The beneficial effects of the present application are as follows:

[0045] 1. The present application has the advantages of adjustable punching size, small volume, convenient carrying, temporary storage and observation of leaves.

[0046] 2. The present application can conveniently adjust the punching size, and the present application does not need to replace different punchers when changing the punching size, thereby saving the volume and facilitating carrying.

[0047] 3. The present application adjusts the hole diameter of the puncher by tensioning or loosening the steel bar through the operation of the adjusting piece, without the need to replace different punchers, so that the present application is simple to operate, small in size and convenient to carry.

[0048] 4, The utility model discloses can conveniently control the size of the ring through the initiative knob. Because the process of adjusting the ring is continuously changed, therefore can satisfy the demand of user for different aperture more accurately.

[0049] 5, The utility model discloses can be more stably controlled steel bar through initiative knob and driven knob clamping, avoid the decoupling between steel bar and adjusting part and influence use.

[0050] 6, The utility model discloses make the punching edge more distinct, improve the punching effect, improve the sampling effect of the sampling part of blade.

[0051] 7, The utility model discloses can more conveniently observe the sampling part and the part to be sampled of blade. Similarly, the observation part can temporarily store the blade. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 It is structural schematic view of the leaf puncher of adjustable punching size in example 1;

[0053] Figure 2 It is structural enlarged view of the stand;

[0054] Figure 3 It is structural enlarged view of the steel bar in example 1;

[0055] Figure 4 It is top view of the steel bar in example 1;

[0056] Figure 5 It is structural enlarged view of the initiative knob in example 1;

[0057] Figure 6 It is structural enlarged view of the driven knob in example 1;

[0058] Figure 7 It is structural schematic view of the leaf puncher of adjustable punching size in example 2;

[0059] Figure 8 It is structural enlarged view of the adjusting part in example 2;

[0060] Figure 9 It is bottom view of the adjusting part in example 2;

[0061] Figure 10 It is structural schematic view of the leaf puncher of adjustable punching size in example 3;

[0062] Figure 11 It is structural schematic view of the leaf puncher of adjustable punching size in example 4;

[0063] REFERENCE NUMERALS:

[0064] 1, top plate; 2, bottom plate; 3, column; 31, upper column; 32, lower column; 33, first spring; 4, punching assembly; 41, punching piece; 41a, first punching piece; 41b, second punching piece; 411, steel bar; 412, first tooth part; 42, adjusting piece; 421, driving knob; 422, driving gear; 423, driven knob; 424, driven gear; 43, limiting piece; 51, punching needle group; 511, punching needle; 512, connecting piece; 52, adjusting knob; 53, second spring; 6, observation part. DETAILED DESCRIPTION

[0065] Obviously, the embodiments described below are part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0066] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connecting" and "connecting" should be understood broadly.

[0067] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0068] The present application provides a leaf puncher capable of adjusting the size of the punch hole, which has the advantages of adjustable punch hole size, small volume, convenient to carry, temporary storage and observation of leaves, to solve the problems in the prior art.

[0069] As shown in Figure 1 , Figure 2 A leaf puncher capable of adjusting the size of the punch hole, comprising a shell, the shell comprising a top plate 1, a bottom plate 2 and a column 3, the top plate 1 being connected to the bottom plate 2 through the column 3, further comprising a punching assembly 4 mounted in the shell, the punching assembly 4 comprising:

[0070] A punching member 41 is connected to the top plate 1 on one side and faces the bottom plate 2 on the other side, and is driven by the top plate 1 to move towards the bottom plate 2 by compressing the column 3;

[0071] An adjusting member 42 is connected to the punching member 41 and adjusts the hole diameter of the punching member 41.

[0072] In use, the leaf to be sampled is placed in the punch, the top plate 1 is pressed, the height of the column 3 is compressed, thereby driving the punching member 41 to punch the leaf; when the size of the punch needs to be adjusted, the adjusting member 42 is used to adjust the punching size of the punching member 41.

[0073] With such a structure, the punching size can be conveniently adjusted, and the punching size of the present application does not need to be changed to different punching members 41, thereby saving space and facilitating carrying.

[0074] The column 3 comprises:

[0075] A first spring 33,

[0076] An upper column 31 is fixedly connected to the top plate 1 on one end and connected to the first spring 33 on the other end,

[0077] A lower column 32 is fixedly connected to the bottom plate 2 on one end and connected to the other end of the first spring 33 away from the upper column 31.

[0078] With such a structure, when the punch is pressed, the top plate 1 and the bottom plate 2 drive the upper column 31 and the lower column 32 respectively, thereby compressing the first spring 33, and after the punching is completed, the punch is released, and the first spring 33 pushes the top plate 1 and the bottom plate 2 to automatically reset.

[0079] The lower column 32 is provided with a groove accommodating the first spring 33, the inner diameter of the groove is greater than the outer diameter of the upper column 31, and the outer diameter of the upper column 31 is greater than the inner diameter of the first spring 33.

[0080] Embodiment 1

[0081] As shown in Figure 1 , Figures 3-6 The present embodiment provides a leaf puncher capable of adjusting the punching size, the punching member 41 comprises:

[0082] A steel strip 411 is a long and thin piece with elasticity, one end of the steel strip 411 is fixed on the top plate 1, the steel strip 411 forms a circular ring around the fixed end thereof, and the other end of the steel strip 411 is connected to the adjusting member 42; the adjusting member 42 adjusts the size of the circular ring by tightening / releasing the other end of the steel strip 411.

[0083] In use, the top plate 1 is pressed to drive the steel bar 411, and the circular ring of the steel bar 411 punches the blade. When the hole diameter of the punch needs to be reduced, the adjusting part 42 is operated to pull the steel bar 411 to be tensioned; because the steel bar 411 is elastic, the force of the circular ring is increased, and the radius of the circular ring is reduced, thereby reducing the hole diameter of the punch. When the hole diameter of the punch needs to be expanded, the adjusting part 42 is operated to push back to relax the steel bar 411, the force of the circular ring is reduced, and the radius of the circular ring is increased, thereby increasing the hole diameter of the punch.

[0084] With such a structure, the hole diameter of the punch is adjusted by tensioning or relaxing the steel bar 411 by operating the adjusting part 42, without the need to replace different punching parts 41, so that the utility model is simple to operate, small in size, and convenient to carry.

[0085] The adjusting part 42 comprises a driving knob 421,

[0086] The driving knob 421 comprises a first rotating shaft and a driving gear 422 fixedly sleeved on the first rotating shaft, and the first rotating shaft is fixedly connected with the shell,

[0087] The steel bar 411 comprises a first tooth portion 412 arranged in the length direction of the steel bar 411, and the first tooth portion 412 is engaged with the driving gear 422.

[0088] When the punching part 41 needs to be adjusted, the driving knob 421 is rotated, the driving knob 421 drives the driving gear 422 to rotate, and because the driving gear 422 is engaged with the first tooth portion 412 of the steel bar 411, the driving knob 421 drives the steel bar 411 to move, the steel bar 411 is tensioned or relaxed, and finally the size of the circular ring is adjusted.

[0089] With such a structure, the size of the circular ring can be conveniently controlled by the driving knob 421. Because the process of adjusting the circular ring is continuously changed, the needs of users for different hole diameters can be more accurately met.

[0090] The adjusting part 42 further comprises a driven knob 423, which comprises a second rotating shaft and a driven gear 424 fixedly sleeved on the second rotating shaft, and the second rotating shaft is fixedly connected with the shell,

[0091] The driving knob 421 and the driven knob 423 clamp the steel bar 411.

[0092] With such a structure, the steel bar 411 can be more stably controlled by clamping the driving knob 421 and the driven knob 423, so as to avoid the decoupling between the steel bar 411 and the adjusting part 42 and affect the use.

[0093] The adjusting member 42 further comprises a limiting member 43 which is detachably connected to the top plate 1 and engaged with the first toothed portion 412.

[0094] With such a structure, after the size of the annular ring is adjusted, the limiting member 43 is fixed to the top plate 1, and the steel bar 411 is fixed due to the engagement between the limiting member 43 and the first toothed portion 412, so that the size of the hole is prevented from being changed accidentally during the punching process.

[0095] Embodiment 2

[0096] As shown in Figure 7 , Figure 8 , Figure 9 The difference between the present embodiment and Embodiment 1 is that the punching member 41 comprises:

[0097] a punching needle group 51 comprising at least two punching needles 511, the tips of the punching needles 511 being directed towards the bottom plate 2, the other ends of the punching needles 511 being connected to the top plate 1,

[0098] a connecting member 512 comprising two sides movably connected around a cross point, the connecting member 512 being in the shape of X, the connecting member 512 connecting two adjacent punching needles 511,

[0099] The adjusting member 42 comprises an adjusting knob 52 and a second spring 53, one end of the second spring 53 being connected to the adjusting knob 52, the other end of the second spring 53 being connected to the punching needles 511, the second spring 53 being extended or retracted with the rotation of the adjusting knob 52.

[0100] In use, the top plate 1 is pressed, the punching needle group 51 penetrates the leaf to be sampled, then the top plate 1 is released, the angle of the punching needle group 51 or the leaf is rotated, the top plate 1 is pressed again to make the punching needle group 51 penetrate the leaf to be sampled, and the above process is repeated several times to complete the punching of the leaf to be sampled.

[0101] When the hole diameter of the punching needs to be adjusted, the adjusting member 42 is adjusted, the adjusting knob 52 is rotated, when the hole diameter of the punching needs to be enlarged, the adjusting knob 52 is rotated in one direction, the second spring 53 is elongated, the second spring 53 drives the punching needles 511 to move outward, so that the distance between the punching needles 511 in the punching needle group 51 is enlarged, thereby increasing the hole diameter of the punching; similarly, when the hole diameter of the punching needs to be reduced, the adjusting knob 52 is rotated in the other direction, the second spring 53 is wound around the adjusting knob 52 to be contracted under stress, drives the punching needles 511 to move inward, so that the distance between the punching needles 511 in the punching needle group 51 is reduced, thereby reducing the hole diameter of the punching.

[0102] With such a structure, the volume of the utility model can be further reduced, and the operation is simple and convenient for carrying.

[0103] Embodiment 3

[0104] As Figure 10 shown, the difference between this embodiment and embodiment 1 is that the punching assembly 4 in this embodiment comprises a first punching member 41a and a second punching member 41b, the first punching member 41a is installed on the top plate 1, the second punching member 41b is installed on the bottom plate 2, and the two first and second punching members 41a and 41b are in corresponding positions.

[0105] The steel bar 411 in the second punching member 41b is sharper towards the side edge of the top plate 1.

[0106] The leaf to be sampled is placed between the first and second punching members 41a and 41b, and the first and second punching members 41a and 41b move relatively to punch the leaf to be sampled by shearing. With such a structure, the punching edge is more distinct, the punching effect is improved, and the sampling effect of the sampled part of the leaf is improved.

[0107] Embodiment 4

[0108] As Figure 11 shown, the difference between this embodiment and embodiment 1, embodiment 3 is that the leaf puncher with adjustable punching size further comprises an observation part 6, the observation part 6 is a hollow transparent member, which is installed outside the bottom plate 2 and corresponds to the position of the punching member 41, a through hole is formed at the connection between the bottom plate 2 and the observation part 6, and the inner diameter of the through hole is greater than the maximum outer diameter of the punching member 41.

[0109] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For those skilled in the art, based on the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A leaf puncher with adjustable punch size, comprising a housing, the housing comprising a top plate (1), a bottom plate (2), a column (3), the top plate (1) being connected to the bottom plate (2) by the column (3), characterized in that, Also included is a punching assembly (4) installed in the shell, the punching assembly (4) comprising: a punching piece (41) connected to the top plate (1) on one side and facing the bottom plate (2) on the other side, the punching piece (41) being driven by the top plate (1) to move towards the bottom plate (2) through compression of the column (3); an adjusting piece (42) connected to the punching piece (41) and adjusting the aperture of the punching piece (41).

2. The adjustable hole size lancing blade of claim 1, wherein, The punching piece (41) comprises: a steel strip (411) which is a long thin piece with elasticity, one end of the steel strip (411) being fixed to the top plate (1), the steel strip (411) forming a circular ring around the fixed end thereof, the other end of the steel strip (411) being connected to the adjusting piece (42); the adjusting piece (42) adjusting the size of the circular ring by tightening / releasing the other end of the steel strip (411).

3. The adjustable hole size lancing blade of claim 2, wherein, The adjusting piece (42) comprises: a driving knob (421), the driving knob (421) comprising a first rotating shaft and a driving gear (422) fixedly sleeved on the first rotating shaft, the first rotating shaft being fixedly connected to the shell, 4. The adjustable hole size lancing blade of claim 3, wherein, the steel strip (411) comprising a first tooth portion (412) arranged in the length direction thereof, the first tooth portion (412) being engaged with the driving gear (422). The adjusting piece (42) further comprises a driven knob (423) comprising a second rotating shaft and a driven gear (424) fixedly sleeved on the second rotating shaft, the second rotating shaft being fixedly connected to the shell, 5. The adjustable hole size lancing blade of claim 3, wherein, the driving knob (421) and the driven knob (423) clamping the steel strip (411).

6. The adjustable hole size lancing blade of claim 1, wherein, The adjusting piece (42) further comprises a limiting piece (43) which is detachably connected to the top plate (1) and engaged with the first tooth portion (412). The punching piece (41) comprises: a punching needle group (51) comprising at least two punching needles (511), the punching needles (511) having pointed ends facing the bottom plate (2), the other ends of the punching needles (511) being connected to the top plate (1), a connecting piece (512) comprising two sides movably connected around a cross point, the connecting piece (512) being X-shaped, the connecting piece (512) connecting adjacent two punching needles (511), 7. The adjustable hole size lancing blade of any one of claims 1-6, wherein, the adjusting piece (42) comprising: an adjusting knob (52) and a second spring (53), one end of the second spring (53) being connected to the adjusting knob (52) and the other end of the second spring (53) being connected to the punching needle (511), the second spring (53) being telescopic with the rotation of the adjusting knob (52). The column (3) comprises: a first spring (33), an upper column (31) having one end fixedly connected to the top plate (1) and the other end connected to the first spring (33), a lower column (32) having one end fixedly connected to the bottom plate (2) and the other end connected to the first spring (33) away from the upper column (31).

8. The adjustable hole size lancing blade of any one of claims 1-6, wherein, The punching assembly (4) comprises a first punching piece (41a) and a second punching piece (41b), the first punching piece (41a) is installed on the top plate (1), the second punching piece (41b) is installed on the bottom plate (2), and the two first punching pieces (41a) and the second punching piece (41b) are in position correspondence.

9. The adjustable hole size blade punch of claim 8 wherein, An observation part (6) is further included, the observation part (6) is a hollow transparent piece, which is installed on the outside of the bottom plate (2) and in position correspondence with the punching piece (41), and a through hole is formed at the connection between the bottom plate (2) and the observation part (6).

Images