阅读说明：本技术 一种基于物联网的智慧型空开装置 (Intelligent air switch device based on Internet of things ) 是由 王永泽 于 2021-10-11 设计创作，主要内容包括：本发明提供一种基于物联网的智慧型空开装置,包括空开主体；所述空开主体的输入端与输出端分别设有三组接口,且接口的内侧两端分别安装一组导片,输入端与输出端的外侧还设有连接框,盖板通过螺钉连接在连接框上,盖板上设有三组插口A；绝缘插块设有三组,并分别固定连接在盖板上口A的底侧,并分别插入到接口中；导线固定部穿过插口A卡装在绝缘插块的顶端。将导线分别插入到导电块B内的回转槽内,通过绝缘压板将导线头一端压住,将导电块B插入到卡槽中,将T型绝缘块转动90°,使导导电块B卡在绝缘插块的卡槽内上,只需将导线插入在导线固定部上压住,并将导电块B卡在卡槽内即可实现导线与导片的连通,拆卸也比较方便。(The invention provides an intelligent air switch device based on the Internet of things, which comprises an air switch main body; the input end and the output end of the air switch main body are respectively provided with three groups of interfaces, two ends of the inner side of each interface are respectively provided with a group of guide vanes, the outer sides of the input end and the output end are also provided with a connecting frame, a cover plate is connected to the connecting frame through screws, and the cover plate is provided with three groups of sockets A; the insulating insertion blocks are provided with three groups, are respectively and fixedly connected with the bottom side of the opening A on the cover plate and are respectively inserted into the interfaces; the wire fixing part passes through the jack A and is clamped at the top end of the insulating plug block. Insert the wire respectively the gyration inslot in the conducting block B, push down wire head one end through insulating clamp plate, insert conducting block B in the draw-in groove, rotate 90 with T type insulating block, make conducting block B card on the draw-in groove of insulating inserted block, only need insert the wire and push down on the wire fixed part to with conducting block B card can realize the intercommunication of wire and conducting strip in the draw-in groove, it is also more convenient to dismantle.)

1. The utility model provides an empty device of opening of intelligent based on thing networking which characterized in that: comprises an air-opening main body (1);

the air switch comprises an air switch main body (1), wherein three groups of interfaces (101) are respectively arranged at the input end and the output end of the air switch main body (1), a group of guide pieces (1011) are respectively arranged at two ends of the inner side of each interface (101), a connecting frame (102) is also arranged at the outer side of each input end and the outer side of each output end, an electric quantity sensor and a temperature sensor are also embedded in the air switch main body (1), a display (103) is also embedded in the air switch main body (1), a control panel and a GPRS module are embedded in the display (103), and the control panel is electrically connected with the electric quantity sensors, the temperature sensors and the GPRS module respectively;

the cover plate (2) is of a square structure and is connected to the connecting frame (102) through screws, and three groups of sockets A (201) are arranged on the cover plate (2);

the insulating insertion blocks (3) are provided with three groups, are respectively and fixedly connected to the bottom sides of the sockets A (201) on the cover plate (2), and are respectively inserted into the interfaces (101);

the lead fixing part (4), the lead fixing part (4) passes through the socket A (201) and is clamped at the top end of the insulating plug block (3);

the lead fixing part (4) comprises a T-shaped insulating block (401), a conductive block B (402) and an insulating pressing plate (403); the conductive block B (402) is of a kidney-shaped structure and is connected to the bottom side of the T-shaped insulating block (401), two groups of vertical through holes (4011) are formed in the T-shaped insulating block (401), two groups of rotary grooves (4021) are formed in the conductive block B (402), one ends of the rotary grooves (4021) are respectively communicated with the through holes (4011), and the other ends of the rotary grooves are arranged on the top side of the conductive block B (402); an insulating pressing plate (403) is arranged between the T-shaped insulating block (401) and the conductive block B (402) and pressed at the upper side end of the rotary groove (4021).

2. The intelligent internet-of-things-based air switch device as claimed in claim 1, wherein an insulating barrier (1012) is further fixedly arranged on the inner side of the interface (101), six sets of supporting springs (1013) are connected between the guide vane (1011) and the interface (101), and the other side of the guide vane (1011) is attached to the insulating barrier (1012).

3. The intelligent internet-of-things-based air switch device as claimed in claim 2, wherein the insulating plug (3) is provided with wedges at both side ends thereof, and the width of the wedge is smaller than the distance between the two sets of insulating bars (1012) attached to the set of guide strips (1011).

4. The intelligent internet-of-things-based air switch device as claimed in claim 1, wherein a socket B (301) is formed at the top end of the insulating plug block (3), the socket B (301) is composed of a hole with the same shape as the conductive block B (402), two sets of insulating pressing plates (403) with a diameter, and a circular hole with a diameter between the lengths, the distance between the two sets of insulating pressing plates (403), a clamping groove (302) is formed in the bottom side of the socket B (301), the clamping groove (302) is of a circular groove structure, the diameter of the circular groove is the same as the length of the conductive block B (402), and the height of the circular groove is 0.5cm greater than the thickness of the conductive block B (402).

5. The intelligent air switch device based on the internet of things as claimed in claim 4, wherein a conductive block A (303) is further embedded in the insulating insertion block (3), the conductive block A (303) is of a wedge-shaped structure, two ends of the conductive block A (303) penetrate through wedge blocks on two sides of the insulating insertion block (3) by 0.5cm respectively, a groove (3031) is formed in the top end of the conductive block A, the groove (3031) is placed in the clamping groove (302), the inner wall of the groove (3031) is overlapped with the inner wall of the clamping groove (302), and the bottom end face of the groove (3031) is 0.5cm higher than the bottom end face of the clamping groove (302).

6. The intelligent internet-of-things-based air switch device as claimed in claim 1, wherein the socket a (201) is composed of a hole with the same shape as the conductive block B (402), and a round hole with the diameter of the top end length of the T-shaped insulating block (401).

7. The intelligent air switch device based on the internet of things as claimed in claim 1, wherein two ends of the insulating pressing plate (403) are respectively provided with an L-shaped lifting plate (4031), the top end of the insulating pressing plate is connected with a guide post (4032), the guide post (4032) is upwards inserted into a guide hole (4012) of the T-shaped insulating block (401), and the guide post (4032) is further sleeved with a pressure spring (4033).

8. The intelligent internet-of-things-based air switch device as claimed in claim 5, wherein when the insulating plug block (3) is inserted into the interface (101), the two wedge surfaces of the conductive block A (303) are respectively contacted with the guide tabs (1011), and when the wire fixing portion (4) is clamped into the clamping groove (302), the conductive block B (402) is contacted with the bottom end surface of the groove (3031) of the conductive block A (303).

Technical Field

The invention belongs to the technical field of intelligent air switches, and particularly relates to an intelligent air switch device based on the Internet of things.

Background

The intelligent air switch is that an IoT technology is utilized, the air switch and an Internet of things module are combined, and electric parameters such as voltage, current, power and the like are monitored in real time.

If the application number is: in CN 202021281103.7's the patent, a wisdom sky host computer of opening is disclosed, the wisdom sky host computer of opening includes circuit board mechanism and shell body mechanism, shell body mechanism includes casing body, casing body one side is equipped with the square hole of first square hole and second, the casing body opposite side is equipped with the square hole of third and the square hole of fourth, the casing body below is equipped with the lower cover, casing body top one side is equipped with the flange, flange one side is equipped with first tongue, flange one side is equipped with limit flange, be equipped with the recess in the limit flange, be equipped with the buckle in the recess, the utility model discloses accessible remote software carries out remote switch-off, has made things convenient for the user crowd.

Based on the aforesaid, traditional wisdom is empty to be opened when using, its input and output are when the wiring, still need insert the wire in the wiring mouth, and move the screw through twisting and drive the preforming and press the wire head in the wiring mouth, then in use, the screw is not hard up very easily, and then lead to wiring intraoral wire head and preforming contact failure or throw off, and then influence the power supply of load, need insert two sets of wires in the wiring mouth sometimes in addition, when the crimping, be unfavorable for compressing tightly of preforming.

Disclosure of Invention

In order to solve the technical problems, the invention provides an intelligent air opening device based on the internet of things, which aims to solve the problems that a wire needs to be inserted into a wire connection port, a pressing sheet is driven by screwing a screw to press a wire head in the wire connection port, and then the screw is easy to loosen in use, so that the wire head in the wire connection port is in poor contact or separated from the pressing sheet, the power supply of a load is influenced, two groups of wires need to be inserted into the wire connection port sometimes, and the pressing of the pressing sheet is not facilitated in the pressing process.

The invention discloses an intelligent air switch device based on the Internet of things, which is achieved by the following specific technical means:

an intelligent air switch device based on the Internet of things comprises an air switch main body;

the input end and the output end of the air switch main body are respectively provided with three groups of interfaces, two ends of the inner side of each interface are respectively provided with a group of guide pieces, the outer sides of the input end and the output end are also provided with a connecting frame, an electric quantity sensor and a temperature sensor are also embedded in the air switch main body, a display is also embedded in the air switch main body, a control panel and a GPRS module are embedded in the display, and the control panel is also respectively electrically connected with the electric quantity sensor, the temperature sensor and the GPRS module;

the cover plate is of a square structure and is connected to the connecting frame through screws, and three groups of sockets A are arranged on the cover plate;

the insulating insertion blocks are provided with three groups, are respectively and fixedly connected with the bottom side of the opening A on the cover plate and are respectively inserted into the openings;

and the wire fixing part passes through the socket A and is clamped at the top end of the insulating plug block.

Furthermore, an insulating barrier strip is fixedly arranged on the inner side of the interface, six groups of supporting springs are connected between the guide sheet and the interface, and the other side of the guide sheet is attached to the insulating barrier strip.

Furthermore, the two side ends of the insulating insertion block are respectively provided with a wedge block, and the width of the wedge block is smaller than the distance between the two groups of insulating barrier strips attached to one group of guide sheets.

Further, the lead fixing part comprises a T-shaped insulating block, a conductive block B and an insulating pressing plate; the conductive block B is of a kidney-shaped structure and is connected to the bottom side of the T-shaped insulating block, two groups of vertical through holes are formed in the T-shaped insulating block, two groups of rotary grooves are formed in the conductive block B, one ends of the rotary grooves are communicated with the through holes respectively, and the other ends of the rotary grooves are arranged on the top side of the conductive block B; the insulating pressing plate is arranged between the T-shaped insulating block and the conducting block B and pressed at the upper end of the rotary groove.

Furthermore, the top end of the insulating insertion block is provided with a socket B, the socket B is composed of a hole with the same shape as the conductive block B, two groups of insulating pressing plates and round holes with the diameter of the distance between the two groups of insulating pressing plates, the bottom side of the socket B is provided with a clamping groove, the clamping groove is of a circular groove structure, the diameter of the circular groove is the same as the length of the conductive block B, and the height ratio of the circular groove to the thickness of the conductive block B is 0.5 cm.

Furthermore, a conductive block A is further embedded on the insulating insertion block, the conductive block A is of a wedge-shaped structure, two ends of the conductive block A penetrate through the wedge blocks on two sides of the insulating insertion block by 0.5cm respectively, a groove is formed in the top end of the conductive block A, the groove is arranged in the clamping groove, the inner wall of the groove is overlapped with the inner wall of the clamping groove, and the bottom end face of the groove is 0.5cm higher than the bottom end face of the clamping groove.

Furthermore, the socket A is composed of a hole with the same shape as the conductive block B and a round hole with the diameter of the top end of the T-shaped insulating block.

Furthermore, the two ends of the insulating pressing plate are respectively provided with an L-shaped lifting plate, the top end of the insulating pressing plate is connected with a guide post, the guide post is upwards inserted into a guide hole of the T-shaped insulating block, and the guide post is further sleeved with a pressure spring.

Furthermore, when the insulating plug block is inserted into the interface, two wedge surfaces of the conductive block A are respectively contacted with the guide sheet, and when the lead fixing part is clamped into the clamping groove, the conductive block B is contacted with the bottom end surface of the groove of the conductive block A.

The invention at least comprises the following beneficial effects:

1. according to the invention, by arranging the insulating cover plate, when the insulating cover plate is connected to the connecting frame through the screws, the insulating insertion block can be inserted into the interface and is arranged between the two groups of guide vanes, and the guide vanes are respectively pressed outwards by utilizing the wedge blocks on the two sides of the insulating insertion block and the wedge-shaped conductive block A, so that the conductive blocks A are respectively and tightly connected with the guide vanes under the action of the supporting spring.

2. According to the invention, the lead fixing part is arranged, so that two groups of leads can be conveniently inserted through the through holes on the T-shaped insulating block and inserted into the rotary groove in the conductive block B, the lead head is wound into the rotary groove in the top side of the conductive block B, and the insulating pressing plate presses one end of the lead head under the action of the pressure spring, so that the leads can be prevented from falling off.

3. According to the invention, the insulating insertion block is arranged, the lead fixing part inserted with the lead penetrates through the socket A on the insulating cover plate, the conductive block B is inserted into the clamping groove, the bottom side of the conductive block B is contacted with the bottom side of the groove of the conductive block A, the T-shaped insulating block is rotated by 90 degrees, so that the conductive block B of the lead fixing part is clamped in the clamping groove of the insulating insertion block, the T-shaped insulating block is positioned outside the socket B and is arranged in the socket A, the lead is communicated with the conductive block A through the conductive block B, and the lead is electrically communicated with the conductive sheet.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1 according to the present invention.

Fig. 3 is a schematic view of another structure of fig. 1 according to the present invention.

Fig. 4 is a schematic structural view of the insulating cover plate of fig. 1 according to the present invention, which is disassembled.

Fig. 5 is a schematic structural view of the hollow body of fig. 4 according to the present invention.

Fig. 6 is an enlarged view of the structure of fig. 5B according to the present invention.

Fig. 7 is a schematic side view of the insulating cover plate of fig. 4 according to the present invention.

Fig. 8 is a schematic view of the wire fixing portions of fig. 7 removed from the insulation wedge according to the present invention.

Fig. 9 is an enlarged view of the structure of fig. 8 at C according to the present invention.

Fig. 10 is a schematic structural view of the insulating insert of the present invention with one end vertically cut.

Fig. 11 is a schematic view of the guide fixing portion of the present invention, which is vertically cut.

Fig. 12 is a schematic view of the structure of fig. 11 with the lead removed according to the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. opening the main body in the air; 101. an interface; 1011. a guide plate; 1012. insulating barrier strips; 1013. supporting a spring; 102. a connecting frame; 103. a display;

2. an insulating cover plate; 201. a socket A;

3. insulating plug blocks; 301. a socket B; 302. a card slot; 303. a conductive block A; 3031. a groove;

4. a wire fixing portion; 401. a T-shaped insulating block; 4011. perforating; 4012. a guide hole; 402. a conductive block B; 4021. a rotary trough; 403. an insulating platen; 4031. an L-shaped lifting plate; 4032. a guide post; 4033. and (5) pressing a spring.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "two ends," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and for example, they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Example (b):

as shown in figures 1 to 12:

the invention provides an intelligent air switch device based on the Internet of things, which comprises an air switch main body 1;

the input end and the output end of the air-break main body 1 are respectively provided with three groups of interfaces 101, two ends of the inner side of the interfaces 101 are respectively provided with a group of guide vanes 1011, the inner side of the interfaces 101 is also fixedly provided with an insulating barrier strip 1012, six groups of support springs 1013 are connected between the guide vanes 1011 and the interfaces 101, the other side of the guide sheet 1011 is adhered to the insulating barrier 1012, the outer sides of the input end and the output end are also provided with a connecting frame 102, the inside of the air-break main body 1 is also embedded with an electric quantity sensor and a temperature sensor, the air-break main body 1 is also embedded with a display 103, the display 103 is embedded with a control panel and a GPRS module, the control panel is also electrically connected with the electric quantity sensor, the temperature sensor and the GPRS module respectively, the electric quantity sensor and the temperature sensor detect the electric quantity and the temperature in the air-conditioning main body 1 and feed back the electric quantity and the temperature to the control panel, the electric quantity and the temperature condition of the air switch can be conveniently checked through the terminal by displaying through the display 103 and feeding back to the terminal through the GPRS module;

referring to fig. 8, the cover plate 2 is a square structure and is connected to the connecting frame 102 through screws, and three groups of sockets a201 are arranged on the cover plate 2;

referring to fig. 7 and 10, the insulating plugs 3 are provided with three sets, and are respectively fixedly connected to the bottom sides of the sockets a201 on the cover plate 2, and are inserted into the interface 101, the two side ends of the insulating plug 3 are respectively provided with a wedge block, the width of the wedge block is smaller than the distance between the two groups of insulating barrier strips 1012 attached to one group of conducting strips 1011, the insulating plug 3 is also embedded with a conducting block A303, the conducting block A303 is in a wedge-shaped structure, the two ends of the insulating plug block respectively penetrate through the wedge blocks at the two sides of the insulating plug block 3 by 0.5cm, the insulating cover plate 2 is connected on the connecting frame 102 through screws, the insulating plug block 3 is inserted into the interface 101, and is placed between two sets of conducting strips 1011, the wedge blocks on both sides of the insulating plug 3 and the wedge-shaped conducting block A303 are used to respectively press the conducting strips 1011 outwards, thereby, under the action of the support spring 1013, the conductive blocks a303 are respectively and tightly connected with the conductive pieces 1011, so that the conductive wires are electrically connected with the conductive pieces 1011; the top end of the insulating plug 3 is provided with a socket B301, the socket B301 is composed of a hole with the same shape as the conductive block B402, two groups of round holes with the distance between the lengths of the insulating pressing plates 403 and the round holes, the distance between the lengths is the diameter, the bottom side of the socket B301 is provided with a clamping groove 302, the clamping groove 302 is of a round groove structure, the diameter of the round groove is the same as the length of the conductive block B402, the height is 0.5cm larger than the thickness of the conductive block B402, the top end of the conductive block A303 is provided with a groove 3031, the groove 3031 is arranged in the clamping groove 302, the inner wall of the groove 3031 is overlapped with the inner wall of the clamping groove 302, the bottom end surface of the groove 3031 is 0.5cm higher than the bottom end surface of the clamping groove 302, the lead fixing part 4 inserted with a lead penetrates through the socket A201 on the insulating cover plate 2, the conductive block B402 is inserted into the clamping groove 302, the bottom side of the conductive block B402 is contacted with the bottom side of the groove 3031 of the conductive block A303, the T-shaped insulating block 401 is rotated by 90 degrees, and the clamping groove 402 of the conductive block B4 is clamped in the plug 3, a T-shaped insulating block 401 is arranged outside the socket B301 and in the socket A201, so that a lead is communicated with the conductive block A303 through a conductive block B402;

the lead fixing part 4 is clamped at the top end of the insulating plug block 3 through the socket A201; referring to fig. 11 and 12, the wire fixing portion 4 includes a T-shaped insulating block 401, a conductive block B402, and an insulating pressing plate 403; the conductive block B402 is of a kidney-shaped structure and is connected to the bottom side of the T-shaped insulating block 401, two groups of vertical through holes 4011 are formed in the T-shaped insulating block 401, two groups of rotary grooves 4021 are formed in the conductive block B402, one ends of the rotary grooves 4021 are respectively communicated with the through holes 4011, and the other ends of the rotary grooves 4021 are arranged on the top side of the conductive block B402; the insulating pressing plate 403 is arranged between the T-shaped insulating block 401 and the conducting block B402 and pressed at the upper side end of the rotary groove 4021, the jack A201 is composed of a hole with the same shape as the conducting block B402 and a round hole with the length of the top end of the T-shaped insulating block 401 as the diameter, two groups of wires can conveniently penetrate through the through hole 4011 in the T-shaped insulating block 401 and can be inserted into the rotary groove 4021 in the conducting block B402, the wire head is wound into the rotary groove 4021 in the top side of the conducting block B402, the wire fixing part 4 with the inserted wires can conveniently penetrate through the jack A201 in the insulating cover plate 2, the conducting block B402 can be inserted into the clamping groove 302, and the bottom side of the conducting block B402 is in contact with the bottom side of the groove 3031 of the conducting block A303.

Referring to fig. 11 and 12, two ends of the insulating pressing plate 403 are further provided with an L-shaped lifting plate 4031, the top end of the insulating pressing plate 403 is further connected with a guide post 4032, the guide post 4032 is inserted upwards into the guide hole 4012 of the T-shaped insulating block 401, and the guide post 4032 is further sleeved with a pressure spring 4033, so that the insulating pressing plate 403 is lifted by the L-shaped lifting plate 4031, the lead head is conveniently clamped into the rotary groove 4021 on the top side of the conductive block B402, and the lead head is pressed by the insulating pressing plate 403 under the action of the pressure spring 4033, and the lead is prevented from coming off from the rotary groove 4021 on the top side of the conductive block B402.

When the insulating plug 3 is inserted into the interface 101, the two wedge surfaces of the conductive block a303 respectively contact with the guide tabs 1011, and the wedge blocks on the two sides of the insulating plug 3 and the wedge-shaped conductive block a303 are utilized to respectively press the guide tabs 1011 outwards, so that the conductive blocks a303 are respectively and tightly connected with the guide tabs 1011 under the action of the supporting springs 1013, and when the lead fixing part 4 is clamped into the clamping groove 302, the conductive block B402 contacts with the bottom end surface of the groove 3031 of the conductive block a303, so that the lead is conveniently connected with the conductive block a303 through the conductive block B402.

The specific use mode and function of the embodiment are as follows:

in the invention, the insulating cover plate 2 is connected to the connecting frame 102 through screws, so that the insulating plug 3 is inserted into the interface 101 and is arranged between the two groups of guide vanes 1011, and the guide vanes 1011 are respectively pressed outwards by utilizing wedge blocks at two sides of the insulating plug 3 and wedge-shaped conductive blocks A303, so that the conductive blocks A303 are respectively and tightly connected with the guide vanes 1011 under the action of the supporting spring 1013;

two groups of leads are respectively penetrated through holes 4011 on a T-shaped insulating block 401 and inserted into a rotary groove 4021 in a conductive block B402, an insulating pressing plate 403 is lifted by an L-shaped lifting plate 4031, so that leads can be conveniently clamped into the rotary groove 4021 on the top side of the conductive block B402, and the leads are pressed by the insulating pressing plate 403 under the action of a supporting spring 4033, so that the leads are prevented from being separated from the rotary groove 4021 on the top side of the conductive block B402;

the lead fixing part 4 inserted with a lead penetrates through the socket A201 on the insulating cover plate 2, the conductive block B402 is inserted into the clamping groove 302, the bottom side of the conductive block B402 is contacted with the bottom side of the groove 3031 of the conductive block A303, the T-shaped insulating block 401 is rotated by 90 degrees, the conductive block B402 of the lead fixing part 4 is clamped in the clamping groove 302 of the insulating inserting block 3, the T-shaped insulating block 401 is positioned outside the socket B301 and is arranged in the socket A201, the lead is communicated with the conductive block A303 through the conductive block B402, the lead is electrically communicated with the guide piece 1011, and poor contact between the lead and the guide piece can be effectively prevented.

The invention is not described in detail, but is well known to those skilled in the art.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.