Tissue grinder

Abstract

The present invention relates to a tissue grinder. The tissue grinder comprises an inner tube and a sleeve. The inner tube has a receiving cavity, and the first end of the inner tube is an opening connected to the receiving cavity. The sleeve is detachably mounted on the inner tube from the second end of the inner tube, and can rotate relative to the inner tube. The outer surface of the second end of the inner tube and / or the inner surface of the sleeve are at least partially grinding surfaces, and the second end of the inner tube is provided with a plurality of through holes connecting the receiving cavity and the inside of the sleeve. When using the tissue grinder, an appropriate amount of tissue to be ground is placed in the sleeve, and the sleeve is then mounted on the inner tube from the second end of the inner tube, and the sleeve can be rotated and the tissue to be ground can be ground through the grinding surface to obtain a tissue suspension, and the tissue suspension enters the receiving cavity through the through hole. After the tissue to be ground is fully ground, the user can absorb the tissue suspension from the receiving cavity for observation or inspection. The entire device has a simple structure and is very convenient to operate, and can be quickly completed by a single person.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, in particular to a tissue grinder. Background Art

[0002] With the development of medical technology, various detection technologies have emerged. Some detection technologies detect collected human tissues to assist doctors in making accurate judgments. In some cases, it is also necessary to grind these collected human tissues to obtain tissue suspension for instrument detection, which requires the use of tissue grinding devices.

[0003] The traditional tissue grinding device has a complex structure and is cumbersome to operate. When performing testicular microsperm extraction or preparing testicular puncture specimens, it is necessary to quickly grind the testicular tissue and draw the tissue suspension for observation. The traditional tissue grinding device is difficult to perform this task well due to its complex structure and cumbersome operation. Summary of the invention

[0004] Based on this, it is necessary to provide a tissue grinder with simple structure and easy operation to address the above problems.

[0005] A tissue grinder comprising:

[0006] An inner tube having a receiving cavity therein and a first end of the inner tube being an opening communicating with the receiving cavity; and

[0007] A sleeve, which is detachably sleeved on the inner tube from the second end of the inner tube and can rotate relative to the inner tube;

[0008] The outer surface of the second end of the inner tube and / or at least a part of the inner surface of the sleeve is a polished surface, and the second end of the inner tube is provided with a plurality of through holes connecting the accommodating cavity and the interior of the sleeve.

[0009] The above-mentioned tissue grinder includes an inner tube containing a accommodating cavity and a sleeve detachably mounted on the inner tube. A grinding surface is provided on the inner tube and / or the sleeve, and a through hole is provided on the inner tube. When in use, it is only necessary to put an appropriate amount of tissue to be ground into the sleeve, and then the sleeve is mounted on the inner tube from the second end of the inner tube, and then the sleeve can be rotated and the tissue to be ground can be ground through the grinding surface to obtain a tissue suspension. The tissue suspension enters the accommodating cavity of the inner tube through the through hole. After the tissue to be ground is fully ground, the user can absorb the tissue suspension from the accommodating cavity for the next step of observation or inspection. The entire device has a simple structure and is very convenient to operate.

[0010] In one embodiment, a limiting mechanism is provided between the inner tube and the sleeve, and the limiting mechanism limits the sleeve relative to the inner tube in the axial direction, thereby preventing the sleeve from unexpectedly sliding off the inner tube during use, especially during grinding, and enhancing the working stability of the tissue grinder.

[0011] In one embodiment, the limiting mechanism is a limiting thread, and the limiting thread includes an external thread provided on the outer surface of the inner tube and an internal thread provided on the inner surface of the sleeve, and the sleeve has a threaded connection mating state and a threaded separation limiting state relative to the inner tube;

[0012] Wherein, when the sleeve is in the mating state, the sleeve rotates relative to the inner tube along the first direction, and the two are mated through the limiting thread connection;

[0013] When the sleeve continues to rotate relative to the inner tube along the first direction until the internal thread is disengaged from the external thread, the sleeve switches from the fitting state to the limiting state relative to the inner tube, so that the internal thread is axially limited above the external thread, and the sleeve can idle relative to the inner tube along the first direction.

[0014] In one embodiment, the second end of the inner tube and the end of the sleeve away from the opening are both conical. The conical design can increase the effective grinding area, and the grinding force is more uniform, which is conducive to improving the grinding effect. At the same time, compared with the flat-bottom design, it is also easier to raise the liquid level of the tissue suspension produced by grinding. Even if the amount of tissue suspension is small, it still has a higher liquid level, which is convenient for the user to absorb the tissue suspension after the grinding operation is completed.

[0015] In one embodiment, the conical outer surface of the inner tube is a first conical surface, the conical inner surface of the sleeve is a second conical surface, and the first conical surface and / or the second conical surface are grinding surfaces provided with a plurality of grinding protrusions. The grinding protrusions are provided on the conical surface to ensure that the tissue to be ground located in the conical area can be well ground.

[0016] In one embodiment, the tissue grinder further comprises a cover, which is connected to the first end of the inner tube and can cover the opening. During the grinding process, the user can actively cover the cover to prevent the tissue being ground or the tissue suspension obtained during the grinding from splashing out of the accommodating chamber due to collision or grinding extrusion, and the cover can also effectively seal the opening at the first end of the inner tube, and together with the sleeve, isolate the accommodating chamber from the outside world, so as to prevent the outside world from contaminating the tissue suspension to be used for observation or detection.

[0017] In one embodiment, an inner sealing ring is provided on a side of the cover facing the opening, and the inner sealing ring can effectively enhance the sealing performance of the cover to the opening.

[0018] In one embodiment, the inner tube and the sleeve are made of plastic. Plastic material is cheap and stable, and is very suitable for making disposable medical devices. It does not need to be cleaned after use, and it avoids the pollution caused by repeated use that affects the accuracy of observation or detection results. In addition, the production and processing of plastic is easy, and the industrial chain is mature, so it can be produced quickly and in large quantities. Among them, the use of transparent or translucent plastics is also helpful to observe the internal grinding of the tissue grinder in real time, judge the degree of grinding, and then judge whether to continue grinding according to the degree of grinding, accurately grasp the grinding completion time, and also facilitate observation of whether the suction position is accurate during the suction operation.

[0019] In one embodiment, the diameter of the through hole is 0.3 mm to 0.7 mm. Such a diameter can well allow the ground tissue suspension to enter the accommodating cavity, while preventing the unground tissue from entering the accommodating cavity.

[0020] In one embodiment, the tissue grinder further comprises a support, and the inner tube and the sleeve can be placed on the support, so that the inner tube and the sleeve can be placed in a suitable position for easy operation during the grinding process or when the tissue suspension is sucked after the grinding is completed, and the tissue grinder can also be well placed when it is not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a tissue grinder in one embodiment of the present invention;

[0022] Figure 2 for Figure 1 An enlarged schematic diagram of area A of the tissue grinder is shown;

[0023] Figure 3 for Figure 1 Schematic diagram of the size and structure of the tissue grinder shown.

[0024] 100, tissue grinder; 11, inner tube; 111, through hole; 112, external thread; 113, grinding protrusion; 12, device cover; 121, inner sealing ring; 21, sleeve; 212, internal thread. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] See also Figure 1 and Figure 2 , a tissue grinder 100 provided in one embodiment of the present invention comprises an inner tube 11 and a sleeve 21. The inner tube 11 has a receiving cavity, and the first end of the inner tube 11 is an opening communicating with the receiving cavity. The sleeve 21 is detachably mounted on the inner tube 11 from the second end of the inner tube 11 and can rotate relative to the inner tube 11. The outer surface of the second end of the inner tube 11 and / or the inner surface of the sleeve 21 are at least partially grinding surfaces, and the second end of the inner tube 11 is provided with a plurality of through holes 111 communicating with the receiving cavity and the inside of the sleeve 21.

[0032] When the tissue grinder 100 is used, an appropriate amount of tissue to be ground is placed in the sleeve 21, and then the sleeve 21 is sleeved on the inner tube 11 from the second end of the inner tube 11, and the sleeve 21 can be rotated to grind the tissue to be ground through the grinding surface to obtain a tissue suspension. The tissue suspension enters the accommodating cavity of the inner tube 11 through the through hole 111. After the tissue to be ground is fully ground, the user can absorb the tissue suspension from the accommodating cavity for observation or inspection and other next operations. The entire device has a simple structure and is very convenient to operate, and can be quickly completed by a single person.

[0033] Specifically, the second end of the inner tube 11 and the end of the sleeve 21 away from the opening are both conical. The conical design can increase the effective grinding area, and the grinding force is more uniform, which is conducive to improving the grinding effect. At the same time, compared with the flat-bottom design, it is also easier to raise the liquid level of the tissue suspension produced by grinding. Even if the amount of tissue suspension is small, it still has a higher liquid level, which is convenient for the user to absorb the tissue suspension after the grinding operation is completed.

[0034] Further, the conical outer surface of the inner tube 11 is the first conical surface, the conical inner surface of the sleeve 21 is the second conical surface, and the first conical surface and / or the second conical surface are grinding surfaces provided with a plurality of grinding protrusions 113. That is, the first conical surface is a grinding surface provided with a plurality of grinding protrusions 113, or the second conical surface is a grinding surface provided with a plurality of grinding protrusions 113, or both the first conical surface and the second conical surface are grinding surfaces provided with a plurality of grinding protrusions 113. The grinding protrusions 113 are provided on the conical surface to ensure that the tissue to be ground located in the conical area can be well ground.

[0035] In this specific embodiment, both the first conical surface and the second conical surface are grinding surfaces, and both are provided with a plurality of grinding protrusions 113, so that the tissue to be ground can be fully ground by the grinding protrusions between the first conical surface and the second conical surface, ensuring that the tissue to be ground is fully ground. It can be understood that the grinding surface can adopt other grinding forms, such as grinding patterns, grinding particles, etc., as long as it can be suitable for the tissue to be ground and grind it to ensure that a tissue suspension can be obtained, and no specific limitation is made here.

[0036] In some embodiments, a limiting mechanism is provided between the inner tube 11 and the sleeve 21, and the limiting mechanism limits the sleeve 21 axially relative to the inner tube 11. This limiting effect can be a one-way limit to prevent the sleeve 21 from sliding relative to the inner tube 11, or a two-way limit to limit the sleeve 21 to move along the axis of the inner tube 11 within a certain range relative to the inner tube 11. The one-way limiting mechanism prevents the sleeve 21 from unexpectedly sliding off the inner tube 11 during use, especially during grinding, and enhances the stability of the tissue grinder 100. In addition to preventing the sleeve 21 from unexpectedly sliding off, the two-way limiting mechanism can also retain a certain gap between the sleeve 21 and the inner tube 11, so as to avoid excessive fit between the sleeve 21 and the inner tube 11 when necessary, so that the tissue to be ground is subjected to unexpected extrusion, which has an unnecessary impact on the grinding effect. This part of the gap can also be well used as a storage space to accommodate the tissue to be ground after grinding.

[0037] In this specific embodiment, the limiting mechanism is a limiting thread, and the limiting thread includes an external thread 112 provided on the outer surface of the inner tube 11 and an internal thread 212 provided on the inner surface of the sleeve 21 near the opening end. The sleeve 21 has a threaded mating state and a threaded separation limiting state relative to the inner tube 11. When the sleeve 21 is in the mating state, the sleeve 21 rotates relative to the inner tube 11 along the first direction, and the two are connected and matched by the limiting thread. When the sleeve 21 continues to rotate relative to the inner tube 11 along the first direction until the internal thread 212 is disengaged from the external thread 112, the sleeve 21 switches from the mating state to the limiting state relative to the inner tube 11, so that the internal thread 212 is limited axially above the external thread 112, and the sleeve 21 can idle relative to the inner tube 11 along the first direction. When in use, the sleeve 21 is put on the inner tube 11, so that the external thread 112 abuts against the internal thread 212. At this time, the sleeve 21 is rotated along the first direction, and the internal thread 212 gradually engages with the external thread 112, and the sleeve 21 enters a matching state until the internal thread 212 and the external thread 112 are completely engaged. The sleeve 21 is then rotated along the first direction, and the internal thread 212 and the external thread 112 gradually separate from each other until the internal thread 212 completely passes over the external thread 112, and the internal thread 212 is axially limited above the external thread 112. At this time, the sleeve 21 follows the internal thread 212 and is in a limited state under the limiting effect, so that the sleeve 21 can be prevented from falling off the inner tube 11. In the limited state, the sleeve 21 can continue to rotate relative to the inner tube 11 along the first direction to perform a grinding operation. When the separation sleeve 21 needs to be removed after grinding, the sleeve 21 only needs to be gently pulled down and rotated along the second direction at the same time, and the internal thread 212 can gradually engage with the external thread 112 and then gradually separate. After the separation is completed, the sleeve 21 can be removed from the inner tube 11, and the entire connection, engagement, and separation process is very smooth. It can be understood that in some other embodiments, other limiting methods can also be used, such as respectively setting an annular protrusion and an annular groove on the surfaces of the sleeve 21 and the inner tube 11 facing each other, the sleeve 21 is sleeved on the inner tube 11 by the second end of the inner tube 11 and applying an external force to make the annular protrusion snap into the annular groove, the size of the annular groove is larger than the annular protrusion, and the annular protrusion can move in the annular groove, thereby allowing the sleeve 21 to move axially along the inner tube 11 within a certain range, or setting mutually matching limiting mechanisms at the bottom of the inner tube 11 and the sleeve 21, etc., it is only necessary to achieve the axial limiting of the sleeve 21 relative to the inner tube 11 without affecting the sleeve 21 being able to rotate relative to the inner tube 11, and no specific limitation is made here.

[0038] In some embodiments, the tissue grinder 100 further includes a cover 12, which is connected to the first end of the inner tube 11 and can cover the opening. During the grinding process, the user can actively close the cover 12 to prevent the tissue being ground or the tissue suspension obtained during the grinding from splashing out of the receiving chamber due to collision or grinding extrusion, and the cover 12 can also effectively close the opening of the first end of the inner tube 11, and together with the sleeve 21, isolate the receiving chamber from the outside world to prevent the outside world from contaminating the tissue suspension to be used for observation or detection.

[0039] Furthermore, an inner sealing ring 121 is provided on the side of the cover 12 facing the opening. A snap-fit ​​structure (not shown) is provided between the inner sealing ring 121 and the first end of the inner tube 11. The inner sealing ring 121 can effectively enhance the sealing performance of the cover 12 to the opening, and the inner sealing ring 121 and the first end of the inner tube 11 are snap-fitted through the snap-fit ​​structure, which can enhance the stability of the closing of the cover 12, and can ensure that the cover 12 is stably covered on the opening without applying additional external force such as pressing.

[0040] Specifically, the inner tube 11 and the sleeve 21 are made of plastic. Plastic materials are cheap and stable in nature, and are very suitable for making medical disposable devices. They do not need to be cleaned after use, and the pollution caused by repeated use is avoided, which affects the accuracy of observation or detection results. In addition, the production and processing of plastics is easy, and the industrial chain is mature, so they can be produced quickly and in large quantities. It is understandable that in some other embodiments, materials such as ceramics, glass, aluminum oxide, agate or quartz can also be used to make a reusable tissue grinder 100. The type of material can be applied to high-temperature sterilization technology, which is not specifically limited here. Among them, the use of transparent, translucent plastics or other transparent, translucent materials is also helpful to observe the internal grinding of the tissue grinder 100 in real time, judge the degree of grinding, and then judge whether to continue grinding according to the degree of grinding, accurately grasp the grinding completion time, and also facilitate observation of whether the suction position is accurate during the suction operation.

[0041] In some embodiments, the diameter of the through hole 111 is 0.3 mm to 0.7 mm. Such a diameter can well allow the ground tissue suspension to enter the accommodating chamber, while preventing the unground tissue from entering the accommodating chamber. The specific diameter is set according to the characteristics of the tissue to be ground, and different specifications of tissue suspension can be obtained by different sizes of through holes 111, which are not specifically limited here.

[0042] See also Figure 3In this specific embodiment, the radius R1 of the inner tube 11 is 0.5 cm, the distance L1 from the upper end of the inner tube 11 to the upper edge of the external thread 112 is 2 cm, the length L2 from the upper edge of the external thread 112 to the conical bottom surface is 1.5 mm, the volume of the second end of the inner tube 11 is 0.5 mL, and the diameter of the through hole 111 is 0.5 mm. The length L3 from the lower edge of the internal thread 212 of the sleeve 21 to the conical bottom surface is 1.5 cm. In some other embodiments, the various components can be designed to different sizes according to the type, shape and characteristics of the tissue to be ground, as long as they can be suitable for storing and grinding the tissue to be ground, and no specific limitation is made here.

[0043] In some embodiments, the tissue grinder 100 further includes a support (not shown), on which the inner tube 11 and the sleeve 21 can be placed, so that the inner tube 11 and the sleeve 21 can be placed in a suitable position for easy operation during the grinding process or when the tissue suspension is sucked after the grinding is completed, and can also be well placed when the tissue grinder is not in use.

[0044] Furthermore, the inner tube 11 is provided with a handle (not shown) near the first end, and the outer surface of the sleeve 21 is provided with anti-slip grooves (not shown). The user can hold the handle and then rotate the sleeve 21. At this time, the anti-slip grooves can effectively increase the grip friction, facilitate the application of rotation force, and help improve the user experience and reduce the actual operation difficulty.

[0045] When the tissue grinder 100 is used, an appropriate amount of tissue to be ground (such as testicular tissue to be tested) is added into the sleeve 21, and then the sleeve 21 is sleeved on the inner tube 11 from the second end of the inner tube 11 until the internal thread 212 abuts against the external thread 112. At this time, the sleeve 21 is rotated along the first direction, and the internal thread 212 and the external thread 112 gradually engage. The internal thread 212 and the external thread 112 are gradually separated again, until the internal thread 212 is completely located above the external thread 112. At this time, the sleeve 21 is limited by the internal thread 212 and the external thread 112, which can effectively prevent unexpected slipping from the inner tube 11 during use, especially during the grinding process. The sleeve 21 can also continue to rotate along the first direction when it is in the limited state. The cover 12 is covered, and the inner tube 11 is clamped by the inner sealing ring 121, so that the accommodating cavity is closed relative to the outside. Hold the handle, hold the sleeve 21, rotate the sleeve 21 relative to the inner tube 11, fully grind the tissue to be ground through the sleeve 21 and the grinding protrusions 113 on the inner tube 11, and observe the grinding situation in real time. When the grinding of the tissue to be ground is fully completed, the generated tissue suspension has entered the accommodating cavity through the through hole 111. Only need to open the cover 12 to suck out the tissue suspension through the opening of the first end of the inner tube 11 through the suction tool, and use it for the next step of observation or inspection. At this point, all the use operations are completed. The entire tissue grinder 100 is very simple in structure and easy to operate. Even if it is used by one person, the required tissue suspension can be obtained through simple operations.

[0046] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A tissue grinder, characterized in that: The tissue grinder comprises: An inner tube having a receiving cavity therein and a first end of the inner tube being an opening communicating with the receiving cavity; and A sleeve, which is detachably sleeved on the inner tube from the second end of the inner tube and can rotate relative to the inner tube; The outer surface of the second end of the inner tube and / or at least a part of the inner surface of the sleeve is a ground surface, and the second end of the inner tube is provided with a plurality of through holes connecting the accommodating cavity and the interior of the sleeve; the second end of the inner tube and the end of the sleeve away from the opening are both conical; the diameter of the through hole is 0.3 mm to 0.7 mm; A limiting mechanism is provided between the inner tube and the sleeve, and the limiting mechanism limits the axial position of the sleeve relative to the inner tube; the limiting mechanism is a limiting thread, and the limiting thread includes an external thread provided on the outer surface of the inner tube and an internal thread provided on the inner surface of the sleeve, and the sleeve has a threaded mating state and a threaded separation limiting state relative to the inner tube; wherein, when the sleeve is in the mating state, the sleeve rotates relative to the inner tube along a first direction, and the two are connected and mated by the limiting thread; when the sleeve continues to rotate relative to the inner tube along the first direction until the internal thread is disengaged from the external thread, the sleeve switches from the mating state to the limiting state relative to the inner tube, so that the internal thread is limited axially above the external thread, and the sleeve can idle relative to the inner tube along the first direction.

2. The tissue grinder according to claim 1, characterized in that The conical outer surface of the inner tube is a first conical surface, the conical inner surface of the sleeve is a second conical surface, and the first conical surface and / or the second conical surface are grinding surfaces provided with a plurality of grinding protrusions.

3. The tissue grinder according to claim 2, characterized in that: The first conical surface and the second conical surface are both grinding surfaces provided with a plurality of grinding protrusions.

4. The tissue grinder according to claim 1, characterized in that: The tissue grinder further comprises a cover, which is connected to the first end of the inner tube and can cover the opening.

5. The tissue grinder according to claim 4, characterized in that: An inner sealing ring is arranged on one side of the cover facing the opening.

6. The tissue grinder according to claim 5, characterized in that The inner sealing ring and the first end of the inner tube are provided with a clamping structure.

7. The tissue grinder according to claim 1, characterized in that: The inner tube and the sleeve are made of plastic.

8. The tissue grinder according to claim 1, characterized in that: The tissue grinder further comprises a support, and the inner tube and the sleeve can be placed on the support.

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