A strapdown laser semi-active guidance head

Abstract

The present invention belongs to the technical field of guidance seekers, and specifically is a strapdown laser semi-active guidance head, comprising a base and a shell mounted on the base, wherein a signal processing board and an optical component are mounted on the base; a column is mounted on the base, a mounting groove is provided on the surface of the column, the signal processing board is inserted into the mounting groove, and a fixing ring is sleeved and mounted on the outer side of the signal processing board; a mounting frame is mounted on the upper end of the column, the mounting frame is fixed to the column by screws, and the optical component is mounted on the mounting frame; the present invention has a simple structure, can conveniently fix the internal components of the guidance head, and can reduce the number of bolts used while ensuring the fixing effect, thereby facilitating the production and assembly of the guidance head and improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of guidance seekers, in particular to a strapdown laser semi-active seeker. Background Art

[0002] The laser guidance system controls and guides the missile's precise flight trajectory according to a specific reference target to accurately strike the target. Laser has the characteristics of strong directionality and good monochromaticity. At the same time, laser guidance has the advantages of high accuracy, high resolution, simple structure and low cost. This has made laser-guided missiles widely used on the battlefield, and modern warfare has also moved from relatively blind strikes to rational and precise strikes.

[0003] Laser guidance systems generally operate through the coordination of software, hardware, and optical components. The laser guidance head is one of the most important hardware components in the laser guidance system. However, in actual use, the chip disk inside the laser guidance head requires multiple bolts to fix it during the assembly process, which makes its assembly efficiency low during mass production and delays work time. Summary of the Invention

[0004] In order to make up for the shortcomings of the existing technology, facilitate the fixation of the internal components of the guide head, reduce the number of bolts used while ensuring the fixing effect, facilitate the production and assembly of the guide head, and improve production efficiency, the present invention proposes a strapdown laser semi-active guide head.

[0005] The present invention solves the technical problem by adopting the following technical solution: a strapdown laser semi-active guidance head comprises a base and a housing mounted on the base, a signal processing board and an optical component are mounted on the base, and the signal processing board and the optical component do not contact the inner wall of the housing;

[0006] A column is mounted on the base, and the column is mounted on the base by screw thread or welding. A mounting groove is provided on the surface of the column, and the mounting grooves are evenly distributed around the axis of the column. The signal processing board is inserted into the mounting groove. A fixing ring is sleeved and mounted on the outer side of the signal processing board. The fixing ring is provided with openings that overlap each other, and the openings on the fixing ring are connected by bolts.

[0007] A mounting bracket is installed on the upper end of the column, and the mounting bracket is fixed to the column by screws. The optical component is installed on the mounting bracket, and the lower end of the mounting bracket abuts against the upper end of the signal processing board.

[0008] Preferably, a pressure ring is installed at the lower end of the mounting frame, and the pressure ring is elastic and exerts downward pressure on the signal processing board.

[0009] Preferably, the mounting bracket includes a mounting plate and a fixing cylinder. The fixing cylinder is sleeved on the upper end of the column, and the fixing cylinder and the column are fixed to each other by screws. The mounting plate is connected to the upper end of the fixing cylinder, and the optical component is mounted on the mounting plate. A reinforcing plate is provided between the mounting plate and the fixing cylinder, and the reinforcing plate is triangular.

[0010] Preferably, a limiting groove is provided on the column. The depth of the limiting groove is less than the depth of the mounting groove. The screw on the fixing cylinder is inserted into the limiting groove, and the width of the limiting groove is equal to the diameter of the screw.

[0011] Preferably, an elastic layer is mounted on the inner side of the fixing ring. A fixing groove is provided on the signal processing board, and the fixing ring is located in the fixing groove.

[0012] Preferably, protrusions are provided on the surface of the elastic layer. The center line of the protrusions is parallel to the axis of the column, and the thickness of the signal processing board is less than or equal to the distance between any two adjacent protrusions.

[0013] Preferably, a positioning pad is mounted on the base. A magnetic plate is mounted on the lower surface of the positioning pad, and the magnetic plate and the base attract each other;

[0014] The cross-section of the positioning pad is a "U"-shaped groove. The lower end of the signal processing board is inserted into the groove on the positioning pad. The end of the positioning pad close to the column extends and is inserted into the mounting groove, and the part of the positioning pad inserted into the mounting groove is located on the bottom surface of the mounting groove.

[0015] Preferably, air holes are provided in the column. A lower branch hole is provided between the mounting groove and the air holes. A cavity is provided in the positioning pad, and the cavity is connected to the air holes through the lower branch hole. A check valve II is mounted at the end of the positioning pad far from the column;

[0016] A check valve I is mounted at the upper end of the air hole. An upper branch hole is provided on the fixing cylinder, and the upper branch hole is connected to the outlet at the upper end of the air hole.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the strapdown laser semi-active seeker of the present invention, by providing a column, a mounting groove, a fixing ring and a mounting bracket, the signal processing board is installed in the mounting groove, and the signal processing board is fully fixed by using the fixing ring and the mounting bracket. While ensuring the fixing effect of the signal processing board, the steps and the number of bolts required for the production and assembly of the seeker are reduced, the difficulty and complexity of the production and assembly are reduced, and the production and assembly efficiency of the seeker by the staff is improved.

[0019] 2. The strapdown laser semi-active seeker described in the present invention is provided with a pressure ring, a positioning pad, a cavity and an air hole. When the pressure ring and the positioning pad perform vibration reduction and buffering on the signal processing board, the signal processing board reciprocates and squeezes the positioning pad, so that the air at the bottom of the seeker is pumped to the upper part of the seeker, thereby promoting the circulation of air in the seeker, so as to dissipate the heat on the signal processing board and avoid excessive local temperature in the seeker, which affects the normal operation of the seeker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a front view of the seeker of the present invention;

[0022] Figure 2 Schematic diagram of the internal structure of the seeker of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the center column and positioning pad of the seeker of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the fixing ring in the seeker of the present invention;

[0025] Figure 5 yes Figure 2 A partial enlarged view of the middle part;

[0026] Figure 6 yes Figure 2 A partial enlarged view of point B in the middle;

[0027] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle;

[0028] Figure 8 yes Figure 4 A partial enlarged view of point D in the middle;

[0029] In the figure: base 1, shell 2, column 3, mounting groove 31, limit groove 32, air hole 33, one-way valve 1 331, lower branch hole 332, mounting frame 4, screw 41, upper branch hole 42, pressure ring 43, reinforcement plate 44, optical component 5, signal processing board 6, fixing ring 61, bolt 611, elastic layer 612, protrusion 613, fixing groove 62, positioning pad 63, magnetic plate 631, one-way valve 2 632, cavity 633. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figures 1 to 8As shown, the strapdown laser semi-active guidance head of the present invention comprises a base 1 and a housing 2 mounted on the base 1, a signal processing board 6 and an optical component 5 are mounted on the base 1, and the signal processing board 6 and the optical component 5 do not contact the inner wall of the housing 2;

[0032] The base 1 is provided with a column 3, which is mounted on the base 1 by means of threads or welding. A mounting groove 31 is provided on the surface of the column 3, and the mounting grooves 31 are evenly distributed around the axis of the column 3. The signal processing board 6 is inserted into the mounting groove 31. A fixing ring 61 is sleeved and mounted on the outer side of the signal processing board 6. The fixing ring 61 is provided with openings that overlap each other, and the openings on the fixing ring 61 are connected by bolts 611.

[0033] A mounting bracket 4 is mounted on the upper end of the column 3, and the mounting bracket 4 is fixed to the column 3 by screws 41. The optical component 5 is mounted on the mounting bracket 4, and the lower end of the mounting bracket 4 abuts against the upper end of the signal processing board 6;

[0034] When the staff installs the guide head, they insert the signal processing board 6 into the installation groove 31 on the column 3 in sequence, so that the signal processing board 6 is symmetrically distributed around the column 3. After that, the fixing ring 61 is sleeved and fixed to the outside of the signal processing board 6 to ensure that the mass distribution in the guide head is relatively uniform and the center of gravity is distributed on the axis as much as possible, so that the internal structure of the guide head is stable, avoiding adverse effects such as excessive vibration during its operation, affecting the normal use of the guide head. At the same time, the signal processing board 6 is bound and fixed by the fixing ring 61 to further ensure the stability of the installation of the signal processing board 6 in the guide head, and avoid the signal processing board 6 from detaching from the installation groove 31 when the guide head is working, causing the guide head to malfunction. Obstruction, then, after the signal processing board 6 and the fixing ring 61 are installed, the staff installs the mounting bracket 4 to the upper end of the column 3, and connects and fixes the mounting bracket 4 and the column 3 to each other by screws 41, and closes and blocks the opening of the mounting slot 31 at the upper end of the column 3 by the mounting bracket 4, thereby preventing the signal processing board 6 located in the mounting slot 31 from sliding out of the mounting slot 31 along the axial direction when the guide head is in use, resulting in failure of fixing the signal processing board 6 and affecting the normal use of the guide head. Afterwards, the optical component 5 is fixed to the mounting bracket 4, and the components installed on the base 1 are covered with the housing 2 to prevent the external environment from interfering with or affecting the components installed on the base 1;

[0035] At the same time, during the installation process, the signal processing board 6 is symmetrically inserted into the installation groove 31, and the signal processing board 6 is restrained and fixed by the fixing ring 61. After that, the mounting frame 4 and the optical component 5 are installed on the column 3 in turn to complete the installation of the internal components of the guide head, and the mounting frame 4 is used to perform secondary restraint and fixation on the signal processing board 6 on the column 3 to ensure the installation stability of the components in the guide head. At the same time, it can also effectively reduce the number of bolts 611 used in the assembly production process of the guide head, reduce the number of steps or installation requirements in the installation process, and improve the efficiency of the production and assembly of the guide head.

[0036] As an embodiment of the present invention, a pressure ring 43 is installed at the lower end of the mounting frame 4. The pressure ring 43 is elastic and exerts downward pressure on the signal processing board 6.

[0037] After the mounting frame 4 is installed to the upper end of the column 3, the pressure ring 43 at the lower end of the mounting frame 4 will contact and squeeze the upper surface of the signal processing board 6, thereby further fixing the signal processing board 6 through the pressure ring 43, and preventing the signal processing board 6 from sliding after being vibrated in the mounting groove 31, affecting the normal operation of the guide head. At the same time, by installing the pressure ring 43 on the mounting frame 4, there can be space for elastic deformation between the mounting frame 4 and the signal processing board 6, avoiding direct contact between the two, so as to prevent the mounting frame 4 from excessively squeezing the signal processing board 6 and causing damage to the signal processing board 6. At the same time, by installing the pressure ring 43 at the lower end of the mounting frame 4, the mounting frame 4 can be moved within the allowable range through the deformation of the pressure ring 43 when it is installed on the column 3, thereby facilitating the installation of the mounting frame 4 to the specified position on the column 3, reducing the difficulty of the staff in the production and assembly process of the guide head, and improving the production and assembly efficiency of the guide head.

[0038] As an embodiment of the present invention, the mounting frame 4 includes a mounting plate and a fixing cylinder. The fixing cylinder is sleeved on the upper end of the column 3. The fixing cylinder and the column 3 are fixed to each other by screws 41. The mounting plate is connected to the upper end of the fixing cylinder. The optical component 5 is mounted on the mounting plate. A reinforcing plate 44 is provided between the mounting plate and the fixing cylinder. The reinforcing plate 44 is triangular in shape.

[0039] By installing a reinforcing plate 44 between the mounting plate and the fixed cylinder, the connection between the mounting plate and the fixed cylinder is made stable and reliable, which prevents the connection between the mounting plate and the fixed cylinder from failing when the guide head is in a high overload situation during operation, thereby affecting the stability and normal use of the optical component 5 in the guide head. At the same time, by reinforcing the mounting plate and the fixed cylinder with a reinforcing plate 44, while ensuring a reliable and stable connection, the installation area is expanded, the installation of the optical component 5 on the mounting plate is facilitated, the installation reliability of the optical component 5 is ensured, and the difficulty of the staff in producing and assembling the guide head is reduced, thereby improving the assembly efficiency.

[0040] As an embodiment of the present invention, a limiting groove 32 is formed on the column 3. The depth of the limiting groove 32 is less than the depth of the mounting groove 31. The screw 41 on the fixing cylinder is inserted into the limiting groove 32. The width of the limiting groove 32 is equal to the diameter of the screw 41.

[0041] Since the guide head will be subjected to overload and vibration caused by clamping during operation, directly connecting the fixing tube on the mounting frame 4 to the column 3 through the screw 41 may easily cause the fixing tube to gradually slip on the column 3, affecting the fixing stability of the various components in the guide head and the normal use of the guide head. At the same time, by providing a limiting groove 32 on the column 3, the screw 41 connecting the fixing tube is inserted into the limiting groove 32, effectively ensuring that the relative position of the fixing tube on the column 3 will not change, ensuring that the connection of the internal components of the guide head is stable and reliable during use. At the same time, by inserting the screw 41 into the limiting groove 32, it can also ensure that the installation position of the mounting frame 4 on the column 3 in different guide heads is the same, reducing the difficulty of production and assembly for the staff, and utilizing the same installation position of the mounting frame 4 on the column 3, the pressure ring 43 on the mounting frame 4 exerts the same extrusion force on the signal processing board 6, further ensuring the fixing effect of the signal processing board 6 and facilitating the production and assembly of the guide head by the staff, thereby improving the efficiency of production and assembly.

[0042] As an embodiment of the present invention, an elastic layer 612 is installed on the inner side of the fixing ring 61, a fixing groove 62 is opened on the signal processing board 6, and the fixing ring 61 is located in the fixing groove 62;

[0043] By providing a fixing groove 62 on the signal processing board 6, the fixing ring 61 is located in the fixing groove 62, thereby preventing the fixing ring 61 from sliding along the edge of the signal processing board 6 when the guide head is affected by acceleration and impact loads during use, resulting in poor or failed fixing of the signal processing board 6. At the same time, by providing a fixing groove 62 on the signal processing board 6, it is convenient for the staff to sleeve and place the fixing ring 61 on the outside of the signal processing board 6 during the production and assembly of the guide head, and lock the fixing ring 61 with the bolt 611, thereby facilitating the production and assembly of the guide head by the staff, improving production efficiency, and preventing the fixing ring 61 sleeved on the signal processing board 6 from sliding under the action of gravity during production and assembly, affecting the staff's locking and connection of the fixing ring 61 with the bolt 611.

[0044] As an embodiment of the present invention, a protrusion 613 is provided on the surface of the elastic layer 612, the center line of the protrusion 613 is parallel to the axis of the column 3, and the thickness of the signal processing board 6 is less than or equal to the distance between any two adjacent protrusions 613;

[0045] By setting the elastic layer 612 on the fixing ring 61, the fixing ring 61 can have space for deformation and reduction when the openings on the fixing ring 61 are close to each other and locked by the bolt 611, so that it is convenient for the staff to lock the fixing ring 61 with the bolt 611, avoiding direct contact between the fixing ring 61 and the signal processing board 6. There is no deformation space between the two, so that the openings of the fixing ring 61 cannot be close to or connected to each other, affecting the staff's use of the screw 41 to fix the fixing ring 61. At the same time, the fixing ring 61 contacts the signal processing board 6 through the elastic layer 612, avoiding direct contact between the two. 1. The force exerted on the edge of the signal processing board 6 is too great, resulting in damage to the edge of the signal processing board 6. At the same time, by providing a protrusion 613 on the surface of the elastic layer 612, after the fixing ring 61 is installed on the outside of the signal processing board 6, there are protrusions 613 on both sides of any signal processing board 6, so that the relative position of the signal processing board 6 on the fixing ring 61 can be restricted and fixed by the protrusion 613, so as to avoid the signal processing board 6 being skewed or offset due to external forces such as vibration during the use of the guide head, thereby affecting the fixing effect of the signal processing board 6, and further affecting the normal use of the guide head.

[0046] As an embodiment of the present invention, a positioning pad 63 is installed on the base 1, and a magnetic plate 631 is installed on the lower surface of the positioning pad 63, and the magnetic plate 631 and the base 1 are attracted to each other;

[0047] The cross-section of the positioning pad 63 is a "U"-shaped groove. The lower end of the signal processing board 6 is inserted into the groove on the positioning pad 63. One end of the positioning pad 63 close to the column 3 extends and is inserted into the installation groove 31. The part of the positioning pad 63 inserted into the installation groove 31 is located on the bottom surface of the installation groove 31.

[0048] The staff places the positioning pad 63 on the base 1. The magnetic plate 631 on the positioning pad 63 is used to fix the positioning pad 63 on the surface of the base 1, preventing the position of the positioning pad 63 from moving. At the same time, one end of the positioning pad 63 close to the column 3 is inserted into the installation groove 31, so that the groove on the positioning pad 63 is aligned with the installation groove 31 on the column 3. Then, the staff installs the signal processing board 6 into the installation groove 31 and makes the lower end of the signal processing board 6 enter the groove on the positioning pad 63. Through the groove on the positioning pad 63, after the signal processing board 6 is inserted into the installation groove 31, it can remain relatively stable, facilitating the staff to insert the remaining signal processing boards 6 into other installation grooves 31 on the column 3, reducing the difficulty of the staff in producing and assembling the seeker, improving the production and assembly efficiency. At the same time, through the action of the positioning pad 63 and the pressure ring 43, the upper and lower ends of the signal processing board 6 are in a flexible contact state inside the seeker. While ensuring the reliable fixation of the signal processing board 6, it buffers the vibration or impact generated during the use of the seeker, avoiding or reducing the adverse effects of vibration and impact on the signal processing board 6, and ensuring the normal use of the seeker.

[0049] As an implementation mode of the present invention, an air hole 33 is provided in the column 3. A lower branch hole 332 is provided between the installation groove 31 and the air hole 33. A cavity 633 is provided in the positioning pad 63. The cavity 633 is connected to the air hole 33 through the lower branch hole 332. A check valve two 632 is installed at one end of the positioning pad 63 away from the column 3.

[0050] A check valve one 331 is installed at the upper end of the air hole 33. An upper branch hole 42 is provided on the fixed cylinder. The upper branch hole 42 is connected to the outlet at the upper end of the air hole 33.

[0051] When the seeker is working, the signal processing board 6 vibrates. When the positioning pad 63 and the pressure ring 43 reduce the vibration and buffer the signal processing board 6, the signal processing board 6 will produce reciprocating squeezing on the positioning pad 63, and cooperate with the one-way valve 2 632 installed on the cavity 633 and the one-way valve 1 331 installed in the air hole 33 in the column 3, which will cause the air in the lower part of the seeker to be drawn into the cavity 633 in the positioning pad 63, and then enter the air hole 33 from the lower branch hole 332, and finally pass through the upper branch hole 42 on the fixed tube to reach the upper part of the seeker, so that the air in the seeker circulates, promotes the heat dissipation on the signal processing board 6 and makes the temperature in the seeker relatively balanced, avoiding local excessive temperature and affecting the normal use of the seeker.

[0052] The specific workflow is as follows:

[0053] When the staff installs the guide head, they insert the signal processing board 6 into the installation groove 31 on the column 3 in sequence, so that the signal processing board 6 is symmetrically distributed around the column 3. After that, the fixing ring 61 is sleeved and fixed to the outside of the signal processing board 6 to ensure that the mass distribution in the guide head is relatively uniform and the center of gravity is distributed on the axis as much as possible, so that the internal structure of the guide head is stable, avoiding adverse effects such as excessive vibration during its operation, affecting the normal use of the guide head. At the same time, the signal processing board 6 is bound and fixed by the fixing ring 61 to further ensure the stability of the installation of the signal processing board 6 in the guide head, and avoid the signal processing board 6 from detaching from the installation groove 31 when the guide head is working, causing the guide head to malfunction. Obstruction, then, after the signal processing board 6 and the fixing ring 61 are installed, the staff installs the mounting bracket 4 to the upper end of the column 3, and connects and fixes the mounting bracket 4 and the column 3 to each other by screws 41, and closes and blocks the opening of the mounting slot 31 at the upper end of the column 3 by the mounting bracket 4, thereby preventing the signal processing board 6 located in the mounting slot 31 from sliding out of the mounting slot 31 along the axial direction when the guide head is in use, resulting in failure of fixing the signal processing board 6 and affecting the normal use of the guide head. Afterwards, the optical component 5 is fixed to the mounting bracket 4, and the components installed on the base 1 are covered with the housing 2 to prevent the external environment from interfering with or affecting the components installed on the base 1;

[0054] At the same time, during the installation process, the signal processing board 6 is symmetrically inserted into the installation slot 31, and the fixing ring 61 is used to restrain and fix the signal processing board 6. After that, the mounting frame 4 and the optical assembly 5 are sequentially mounted on the column 3 to complete the installation of the internal components of the guide head. The mounting frame 4 is used to perform a secondary restraint and fixation on the signal processing board 6 on the column 3 to ensure the installation stability of the components in the guide head. At the same time, it can also effectively reduce the number of bolts 611 used in the assembly production process of the guide head, reduce the number of steps or installation requirements in the installation process, and improve the efficiency of the production and assembly of the guide head.

[0055] After the mounting bracket 4 is mounted on the upper end of the column 3, the pressure ring 43 at the lower end of the mounting bracket 4 will contact and press against the upper surface of the signal processing board 6, thereby further fixing the signal processing board 6 through the pressure ring 43, preventing the signal processing board 6 from sliding after being vibrated in the mounting groove 31, affecting the normal operation of the guide head. At the same time, by installing the pressure ring 43 on the mounting bracket 4, there can be a space for elastic deformation between the mounting bracket 4 and the signal processing board 6, avoiding direct contact between the two, so as to avoid excessive squeezing of the signal processing board 6 by the mounting bracket 4, resulting in damage to the signal processing board 6. At the same time, by installing the pressure ring 43 at the lower end of the mounting bracket 4, the mounting bracket 4 can be moved within the allowable range through the deformation of the pressure ring 43 when being mounted on the column 3, thereby facilitating the mounting bracket 4 to be installed at the designated position on the column 3, reducing the difficulty of the staff in the production and assembly process of the guide head, and improving the production and assembly efficiency of the guide head.

[0056] By installing the reinforcing plate 44 between the mounting plate and the fixing cylinder, the connection between the mounting plate and the fixing cylinder is stable and reliable, which prevents the connection between the mounting plate and the fixing cylinder from failing when the guide head is in a high overload condition during operation, thereby affecting the stability and normal use of the optical component 5 in the guide head. At the same time, by reinforcing the mounting plate and the fixing cylinder with the reinforcing plate 44, while ensuring a reliable and stable connection, the installation area is expanded, the installation of the optical component 5 on the mounting plate is facilitated, the installation reliability of the optical component 5 is ensured, and the difficulty of the workers in assembling the guide head during production is reduced, thereby improving the assembly efficiency.

[0057] Since the guide head will be subjected to overload and vibration caused by clamping when working, directly connecting the fixing tube on the mounting bracket 4 to the column 3 by screws 41 may easily cause the fixing tube to gradually slip on the column 3, affecting the fixing stability of the components in the guide head and the normal use of the guide head. At the same time, by providing a limiting groove 32 on the column 3, the screw 41 for connecting the fixing tube is inserted into the limiting groove 32, effectively ensuring that the relative position of the fixing tube on the column 3 does not change, ensuring that the connection of the internal components of the guide head is stable and reliable during use. At the same time, by inserting the screw 41 into the limiting groove 32, it can also ensure that the installation position of the mounting bracket 4 on the column 3 in different guide heads is the same, reducing the difficulty of production and assembly for staff, and using the same installation position of the mounting bracket 4 on the column 3, the pressure ring 43 on the mounting bracket 4 has the same extrusion force on the signal processing board 6, further ensuring the fixing effect of the signal processing board 6 and facilitating the production and assembly of the guide head by staff, thereby improving the efficiency of production and assembly.

[0058] By providing a fixing groove 62 on the signal processing board 6, the fixing ring 61 is located in the fixing groove 62, thereby preventing the fixing ring 61 from sliding along the edge of the signal processing board 6 when the guide head is used and is affected by acceleration and impact loads, resulting in poor or ineffective fixing of the signal processing board 6. At the same time, by providing the fixing groove 62 on the signal processing board 6, it is convenient for the staff to sleeve and place the fixing ring 61 on the outside of the signal processing board 6 during the production and assembly of the guide head, and to lock the fixing ring 61 with the bolt 611, thereby facilitating the production and assembly of the guide head by the staff, improving production efficiency, and preventing the fixing ring 61 sleeved on the signal processing board 6 from sliding under the action of gravity during production and assembly, which affects the staff's locking and connection of the fixing ring 61 with the bolt 611;

[0059] By setting the elastic layer 612 on the fixing ring 61, the fixing ring 61 can have space for deformation and reduction when the openings on the fixing ring 61 are close to each other and locked by the bolt 611, so that it is convenient for the staff to lock the fixing ring 61 with the bolt 611, avoiding direct contact between the fixing ring 61 and the signal processing board 6. There is no deformation space between the two, so that the openings of the fixing ring 61 cannot be close to or connected to each other, affecting the staff's use of the screw 41 to fix the fixing ring 61. At the same time, the fixing ring 61 contacts the signal processing board 6 through the elastic layer 612, avoiding direct contact between the two. 1. The force applied to the edge of the signal processing board 6 is too great, resulting in damage to the edge of the signal processing board 6. At the same time, by providing protrusions 613 on the surface of the elastic layer 612, after the fixing ring 61 is installed on the outside of the signal processing board 6, there are protrusions 613 on both sides of any signal processing board 6. The protrusions 613 are used to limit and fix the relative position of the signal processing board 6 on the fixing ring 61, thereby preventing the signal processing board 6 from being skewed or offset due to external forces such as vibration during use of the guide head, thereby affecting the fixing effect of the signal processing board 6 and further affecting the normal use of the guide head.

[0060] The staff placed the positioning pad 63 on the base 1, and used the magnetic plate 631 on the positioning pad 63 to fix the positioning pad 63 on the surface of the base 1 to prevent the position of the positioning pad 63 from moving. At the same time, the end of the positioning pad 63 close to the column 3 was inserted into the installation groove 31, so that the groove on the positioning pad 63 was aligned with the installation groove 31 on the column 3. After that, the staff installed the signal processing board 6 into the installation groove 31, and made the lower end of the signal processing board 6 enter the groove on the positioning pad 63. Through the groove on the positioning pad 63, the signal processing board 6 was inserted into the installation groove 31. After that, it can remain relatively stable, so that the staff can insert the remaining signal processing boards 6 into other mounting grooves 31 on the column 3, reducing the difficulty of the staff in producing and assembling the guide head and improving the efficiency of production and assembly. At the same time, through the action of the positioning pad 63 and the pressure ring 43, the upper and lower ends of the signal processing board 6 are in a flexible contact state in the guide head. While ensuring that the signal processing board 6 is fixed reliably, the vibration or impact generated during the use of the guide head is buffered, avoiding or reducing the adverse effects of vibration and impact on the signal processing board 6, and ensuring the normal use of the guide head.

[0061] When the seeker is working, the signal processing board 6 vibrates. When the positioning pad 63 and the pressure ring 43 reduce the vibration and buffer the signal processing board 6, the signal processing board 6 will produce reciprocating squeezing on the positioning pad 63, and cooperate with the one-way valve 2 632 installed on the cavity 633 and the one-way valve 1 331 installed in the air hole 33 in the column 3, which will cause the air in the lower part of the seeker to be drawn into the cavity 633 in the positioning pad 63, and then enter the air hole 33 from the lower branch hole 332, and finally pass through the upper branch hole 42 on the fixed tube to reach the upper part of the seeker, so that the air in the seeker circulates, promotes the heat dissipation on the signal processing board 6 and makes the temperature in the seeker relatively balanced, avoiding local excessive temperature and affecting the normal use of the seeker.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A strapdown laser semi-active seeker, comprising a base (1) and a housing (2) mounted on the base (1). A signal processing board (6) and an optical component (5) are mounted on the base (1); Its characteristics are: A column (3) is mounted on the base (1). An installation groove (31) is formed on the surface of the column (3). The signal processing board (6) is inserted and installed into the installation groove (31). A fixing ring (61) is sleeved and installed outside the signal processing board (6); An installation frame (4) is mounted at the upper end of the column (3). The installation frame (4) is fixed to the column (3) by screws (41). The optical component (5) is mounted on the installation frame (4); A pressure ring (43) is mounted at the lower end of the installation frame (4). The pressure ring (43) has elasticity. The pressure ring (43) exerts a downward pressure on the signal processing board (6); The installation frame (4) comprises an installation plate and a fixing cylinder. The fixing cylinder is sleeved on the upper end of the column (3). The fixing cylinder and the column (3) are fixed to each other by screws (41). The installation plate is connected to the upper end of the fixing cylinder. The optical component (5) is mounted on the installation plate. A reinforcing plate (44) is arranged between the installation plate and the fixing cylinder. The reinforcing plate (44) is triangular; A positioning pad (63) is mounted on the base (1). A magnetic plate (631) is mounted on the lower surface of the positioning pad (63). The magnetic plate (631) and the base (1) attract each other; The cross-section of the positioning pad (63) is a "U"-shaped groove. The lower end of the signal processing board (6) is inserted into the groove on the positioning pad (63). One end of the positioning pad (63) close to the column (3) extends and is inserted into the installation groove (31). The part of the positioning pad (63) inserted into the installation groove (31) is located on the bottom surface of the installation groove (31); An air hole (33) is formed in the column (3). A lower branch hole (332) is formed between the installation groove (31) and the air hole (33). A cavity (633) is formed in the positioning pad (63). The cavity (633) is connected to the air hole (33) through the lower branch hole (332). A check valve two (632) is mounted at one end of the positioning pad (63) far from the column (3); A check valve one (331) is mounted at the upper end of the air hole (33). An upper branch hole (42) is formed on the fixing cylinder. The upper branch hole (42) is connected to the outlet at the upper end of the air hole (33); 2. The strapdown laser semi-active guidance head according to claim 1, characterized in that: A limiting groove (3 3. The strapdown laser semi-active guidance head according to claim 1, characterized in that: ​ 4. The strapdown laser semi-active guidance head according to claim 3, characterized in that: The surface of the elastic layer (612) is provided with a protrusion (613), the center line of the protrusion (613) is parallel to the axis of the column (3), and the thickness of the signal processing board (6) is less than or equal to the distance between any two adjacent protrusions (613).

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